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Finding the Fourth Proportional to 91,167.45, 136,301.61 and 77,282.43

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Solution

The fourth proportional to 91,167.45, 136,301.61 and 77,282.43 is: 115,542.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,167.45 : 136,301.61 = 77,282.43 : x
  2. Step 2: Convert to fraction form
    91,167.45/136,301.61 = 77,282.43/x
  3. Step 3: Cross multiply
    91,167.45x = 136,301.61 × 77,282.43
  4. Step 4: Simplify right side
    91,167.45x = 10,533,719,633.71
  5. Step 5: Solve for x
    x = 10,533,719,633.71/91,167.45
  6. Step 6: Final answer
    x = 115,542.55

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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.