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Finding the Fourth Proportional to 92,344.79, 137,849.43 and 81,134.71

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Solution

The fourth proportional to 92,344.79, 137,849.43 and 81,134.71 is: 121,115.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,344.79 : 137,849.43 = 81,134.71 : x
  2. Step 2: Convert to fraction form
    92,344.79/137,849.43 = 81,134.71/x
  3. Step 3: Cross multiply
    92,344.79x = 137,849.43 × 81,134.71
  4. Step 4: Simplify right side
    92,344.79x = 11,184,373,454.78
  5. Step 5: Solve for x
    x = 11,184,373,454.78/92,344.79
  6. Step 6: Final answer
    x = 121,115.37

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.