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Finding the Fourth Proportional to 66,229.80, 99,344.70 and 28,807.80

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Solution

The fourth proportional to 66,229.80, 99,344.70 and 28,807.80 is: 43,211.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,229.80 : 99,344.70 = 28,807.80 : x
  2. Step 2: Convert to fraction form
    66,229.80/99,344.70 = 28,807.80/x
  3. Step 3: Cross multiply
    66,229.80x = 99,344.70 × 28,807.80
  4. Step 4: Simplify right side
    66,229.80x = 2,861,902,248.66
  5. Step 5: Solve for x
    x = 2,861,902,248.66/66,229.80
  6. Step 6: Final answer
    x = 43,211.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.