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Finding the Fourth Proportional to 123,036.20, 169,813.50 and 72,060.20

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Solution

The fourth proportional to 123,036.20, 169,813.50 and 72,060.20 is: 99,456.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,036.20 : 169,813.50 = 72,060.20 : x
  2. Step 2: Convert to fraction form
    123,036.20/169,813.50 = 72,060.20/x
  3. Step 3: Cross multiply
    123,036.20x = 169,813.50 × 72,060.20
  4. Step 4: Simplify right side
    123,036.20x = 12,236,794,772.70
  5. Step 5: Solve for x
    x = 12,236,794,772.70/123,036.20
  6. Step 6: Final answer
    x = 99,456.87

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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.