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Finding the Fourth Proportional to 82,981,805.70, 124,472,708.55 and 42,671,021.70

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Solution

The fourth proportional to 82,981,805.70, 124,472,708.55 and 42,671,021.70 is: 64,006,532.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,981,805.70 : 124,472,708.55 = 42,671,021.70 : x
  2. Step 2: Convert to fraction form
    82,981,805.70/124,472,708.55 = 42,671,021.70/x
  3. Step 3: Cross multiply
    82,981,805.70x = 124,472,708.55 × 42,671,021.70
  4. Step 4: Simplify right side
    82,981,805.70x = 5,311,377,647,594,826
  5. Step 5: Solve for x
    x = 5,311,377,647,594,826/82,981,805.70
  6. Step 6: Final answer
    x = 64,006,532.55

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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.