Home / 128,129.16-176,801.76-71,542.92

Finding the Fourth Proportional to 128,129.16, 176,801.76 and 71,542.92

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Solution

The fourth proportional to 128,129.16, 176,801.76 and 71,542.92 is: 98,720.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,129.16 : 176,801.76 = 71,542.92 : x
  2. Step 2: Convert to fraction form
    128,129.16/176,801.76 = 71,542.92/x
  3. Step 3: Cross multiply
    128,129.16x = 176,801.76 × 71,542.92
  4. Step 4: Simplify right side
    128,129.16x = 12,648,914,171.54
  5. Step 5: Solve for x
    x = 12,648,914,171.54/128,129.16
  6. Step 6: Final answer
    x = 98,720.03

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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.