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Finding the Fourth Proportional to 82,936.20, 124,139.70 and 65,440.20

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Solution

The fourth proportional to 82,936.20, 124,139.70 and 65,440.20 is: 97,951.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,936.20 : 124,139.70 = 65,440.20 : x
  2. Step 2: Convert to fraction form
    82,936.20/124,139.70 = 65,440.20/x
  3. Step 3: Cross multiply
    82,936.20x = 124,139.70 × 65,440.20
  4. Step 4: Simplify right side
    82,936.20x = 8,123,726,795.94
  5. Step 5: Solve for x
    x = 8,123,726,795.94/82,936.20
  6. Step 6: Final answer
    x = 97,951.52

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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.