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Finding the Fourth Proportional to 109,878.54, 151,635.36 and 62,139

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Solution

The fourth proportional to 109,878.54, 151,635.36 and 62,139 is: 85,753.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,878.54 : 151,635.36 = 62,139 : x
  2. Step 2: Convert to fraction form
    109,878.54/151,635.36 = 62,139/x
  3. Step 3: Cross multiply
    109,878.54x = 151,635.36 × 62,139
  4. Step 4: Simplify right side
    109,878.54x = 9,422,469,635.04
  5. Step 5: Solve for x
    x = 9,422,469,635.04/109,878.54
  6. Step 6: Final answer
    x = 85,753.50

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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.