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Finding the Fourth Proportional to 123,070.80, 169,879.88 and 72,099.92

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Solution

The fourth proportional to 123,070.80, 169,879.88 and 72,099.92 is: 99,522.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,070.80 : 169,879.88 = 72,099.92 : x
  2. Step 2: Convert to fraction form
    123,070.80/169,879.88 = 72,099.92/x
  3. Step 3: Cross multiply
    123,070.80x = 169,879.88 × 72,099.92
  4. Step 4: Simplify right side
    123,070.80x = 12,248,325,757.61
  5. Step 5: Solve for x
    x = 12,248,325,757.61/123,070.80
  6. Step 6: Final answer
    x = 99,522.60

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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.