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Finding the Fourth Proportional to 123,125.85, 169,906.36 and 71,438.95

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Solution

The fourth proportional to 123,125.85, 169,906.36 and 71,438.95 is: 98,581.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,125.85 : 169,906.36 = 71,438.95 : x
  2. Step 2: Convert to fraction form
    123,125.85/169,906.36 = 71,438.95/x
  3. Step 3: Cross multiply
    123,125.85x = 169,906.36 × 71,438.95
  4. Step 4: Simplify right side
    123,125.85x = 12,137,931,168.73
  5. Step 5: Solve for x
    x = 12,137,931,168.73/123,125.85
  6. Step 6: Final answer
    x = 98,581.50

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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.