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Finding the Fourth Proportional to 89,687.97, 134,439.64 and 39,791.57

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Solution

The fourth proportional to 89,687.97, 134,439.64 and 39,791.57 is: 59,646.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,687.97 : 134,439.64 = 39,791.57 : x
  2. Step 2: Convert to fraction form
    89,687.97/134,439.64 = 39,791.57/x
  3. Step 3: Cross multiply
    89,687.97x = 134,439.64 × 39,791.57
  4. Step 4: Simplify right side
    89,687.97x = 5,349,564,345.83
  5. Step 5: Solve for x
    x = 5,349,564,345.83/89,687.97
  6. Step 6: Final answer
    x = 59,646.40

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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.