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Finding the Fourth Proportional to 82,729.76, 124,092.40 and 20,400.80

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Solution

The fourth proportional to 82,729.76, 124,092.40 and 20,400.80 is: 30,600.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,729.76 : 124,092.40 = 20,400.80 : x
  2. Step 2: Convert to fraction form
    82,729.76/124,092.40 = 20,400.80/x
  3. Step 3: Cross multiply
    82,729.76x = 124,092.40 × 20,400.80
  4. Step 4: Simplify right side
    82,729.76x = 2,531,584,233.92
  5. Step 5: Solve for x
    x = 2,531,584,233.92/82,729.76
  6. Step 6: Final answer
    x = 30,600.65

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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.