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Finding the Fourth Proportional to 61,376.73, 84,671.28 and 39,864.95

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Solution

The fourth proportional to 61,376.73, 84,671.28 and 39,864.95 is: 54,995.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,376.73 : 84,671.28 = 39,864.95 : x
  2. Step 2: Convert to fraction form
    61,376.73/84,671.28 = 39,864.95/x
  3. Step 3: Cross multiply
    61,376.73x = 84,671.28 × 39,864.95
  4. Step 4: Simplify right side
    61,376.73x = 3,375,415,920.28
  5. Step 5: Solve for x
    x = 3,375,415,920.28/61,376.73
  6. Step 6: Final answer
    x = 54,995.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.