Home / 128,004.07-176,645.32-74,320.51

Finding the Fourth Proportional to 128,004.07, 176,645.32 and 74,320.51

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Solution

The fourth proportional to 128,004.07, 176,645.32 and 74,320.51 is: 102,562.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,004.07 : 176,645.32 = 74,320.51 : x
  2. Step 2: Convert to fraction form
    128,004.07/176,645.32 = 74,320.51/x
  3. Step 3: Cross multiply
    128,004.07x = 176,645.32 × 74,320.51
  4. Step 4: Simplify right side
    128,004.07x = 13,128,370,271.51
  5. Step 5: Solve for x
    x = 13,128,370,271.51/128,004.07
  6. Step 6: Final answer
    x = 102,562.13

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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.