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Finding the Fourth Proportional to 125,338.56, 172,943.28 and 71,640.60

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Solution

The fourth proportional to 125,338.56, 172,943.28 and 71,640.60 is: 98,850.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,338.56 : 172,943.28 = 71,640.60 : x
  2. Step 2: Convert to fraction form
    125,338.56/172,943.28 = 71,640.60/x
  3. Step 3: Cross multiply
    125,338.56x = 172,943.28 × 71,640.60
  4. Step 4: Simplify right side
    125,338.56x = 12,389,760,345.17
  5. Step 5: Solve for x
    x = 12,389,760,345.17/125,338.56
  6. Step 6: Final answer
    x = 98,850.35

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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.