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Finding the Fourth Proportional to 92,345.92, 137,851.11 and 81,135.83

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Solution

The fourth proportional to 92,345.92, 137,851.11 and 81,135.83 is: 121,117.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,345.92 : 137,851.11 = 81,135.83 : x
  2. Step 2: Convert to fraction form
    92,345.92/137,851.11 = 81,135.83/x
  3. Step 3: Cross multiply
    92,345.92x = 137,851.11 × 81,135.83
  4. Step 4: Simplify right side
    92,345.92x = 11,184,664,570.90
  5. Step 5: Solve for x
    x = 11,184,664,570.90/92,345.92
  6. Step 6: Final answer
    x = 121,117.04

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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.