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Finding the Fourth Proportional to 85,115.88, 127,631.10 and 49,588.68

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Solution

The fourth proportional to 85,115.88, 127,631.10 and 49,588.68 is: 74,358.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,115.88 : 127,631.10 = 49,588.68 : x
  2. Step 2: Convert to fraction form
    85,115.88/127,631.10 = 49,588.68/x
  3. Step 3: Cross multiply
    85,115.88x = 127,631.10 × 49,588.68
  4. Step 4: Simplify right side
    85,115.88x = 6,329,057,775.95
  5. Step 5: Solve for x
    x = 6,329,057,775.95/85,115.88
  6. Step 6: Final answer
    x = 74,358.13

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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.