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Finding the Fourth Proportional to 82,729.80, 123,957.90 and 47,608.20

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Solution

The fourth proportional to 82,729.80, 123,957.90 and 47,608.20 is: 71,333.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,729.80 : 123,957.90 = 47,608.20 : x
  2. Step 2: Convert to fraction form
    82,729.80/123,957.90 = 47,608.20/x
  3. Step 3: Cross multiply
    82,729.80x = 123,957.90 × 47,608.20
  4. Step 4: Simplify right side
    82,729.80x = 5,901,412,494.78
  5. Step 5: Solve for x
    x = 5,901,412,494.78/82,729.80
  6. Step 6: Final answer
    x = 71,333.58

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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.