Home / 128,431,986,931.37-177,196,156,582.23-74,218,785,078.77

Finding the Fourth Proportional to 128,431,986,931.37, 177,196,156,582.23 and 74,218,785,078.77

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Solution

The fourth proportional to 128,431,986,931.37, 177,196,156,582.23 and 74,218,785,078.77 is: 102,398,816,497.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,431,986,931.37 : 177,196,156,582.23 = 74,218,785,078.77 : x
  2. Step 2: Convert to fraction form
    128,431,986,931.37/177,196,156,582.23 = 74,218,785,078.77/x
  3. Step 3: Cross multiply
    128,431,986,931.37x = 177,196,156,582.23 × 74,218,785,078.77
  4. Step 4: Simplify right side
    128,431,986,931.37x = 13,151,283,462,160,250,830,848
  5. Step 5: Solve for x
    x = 13,151,283,462,160,250,830,848/128,431,986,931.37
  6. Step 6: Final answer
    x = 102,398,816,497.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.