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Finding the Fourth Proportional to 91,875.70, 137,781.15 and 41,979.70

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Solution

The fourth proportional to 91,875.70, 137,781.15 and 41,979.70 is: 62,954.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,875.70 : 137,781.15 = 41,979.70 : x
  2. Step 2: Convert to fraction form
    91,875.70/137,781.15 = 41,979.70/x
  3. Step 3: Cross multiply
    91,875.70x = 137,781.15 × 41,979.70
  4. Step 4: Simplify right side
    91,875.70x = 5,784,011,342.66
  5. Step 5: Solve for x
    x = 5,784,011,342.66/91,875.70
  6. Step 6: Final answer
    x = 62,954.75

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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.