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Finding the Fourth Proportional to 91,979.96, 137,854.57 and 39,327.64

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Solution

The fourth proportional to 91,979.96, 137,854.57 and 39,327.64 is: 58,942.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,979.96 : 137,854.57 = 39,327.64 : x
  2. Step 2: Convert to fraction form
    91,979.96/137,854.57 = 39,327.64/x
  3. Step 3: Cross multiply
    91,979.96x = 137,854.57 × 39,327.64
  4. Step 4: Simplify right side
    91,979.96x = 5,421,494,901.31
  5. Step 5: Solve for x
    x = 5,421,494,901.31/91,979.96
  6. Step 6: Final answer
    x = 58,942.13

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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.