Home / 128,088.10-176,760.89-74,386.31

Finding the Fourth Proportional to 128,088.10, 176,760.89 and 74,386.31

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Solution

The fourth proportional to 128,088.10, 176,760.89 and 74,386.31 is: 102,652.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,088.10 : 176,760.89 = 74,386.31 : x
  2. Step 2: Convert to fraction form
    128,088.10/176,760.89 = 74,386.31/x
  3. Step 3: Cross multiply
    128,088.10x = 176,760.89 × 74,386.31
  4. Step 4: Simplify right side
    128,088.10x = 13,148,590,359.42
  5. Step 5: Solve for x
    x = 13,148,590,359.42/128,088.10
  6. Step 6: Final answer
    x = 102,652.71

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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.