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Finding the Fourth Proportional to 125,542, 173,263.32 and 72,550

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Solution

The fourth proportional to 125,542, 173,263.32 and 72,550 is: 100,127.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,542 : 173,263.32 = 72,550 : x
  2. Step 2: Convert to fraction form
    125,542/173,263.32 = 72,550/x
  3. Step 3: Cross multiply
    125,542x = 173,263.32 × 72,550
  4. Step 4: Simplify right side
    125,542x = 12,570,253,866
  5. Step 5: Solve for x
    x = 12,570,253,866/125,542
  6. Step 6: Final answer
    x = 100,127.88

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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.