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Finding the Fourth Proportional to 125,359.28, 172,969.18 and 74,388.59

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Solution

The fourth proportional to 125,359.28, 172,969.18 and 74,388.59 is: 102,640.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,359.28 : 172,969.18 = 74,388.59 : x
  2. Step 2: Convert to fraction form
    125,359.28/172,969.18 = 74,388.59/x
  3. Step 3: Cross multiply
    125,359.28x = 172,969.18 × 74,388.59
  4. Step 4: Simplify right side
    125,359.28x = 12,866,933,413.66
  5. Step 5: Solve for x
    x = 12,866,933,413.66/125,359.28
  6. Step 6: Final answer
    x = 102,640.45

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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.