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Finding the Fourth Proportional to 92,623.88, 138,122.29 and 91,781.88

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Solution

The fourth proportional to 92,623.88, 138,122.29 and 91,781.88 is: 136,866.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,623.88 : 138,122.29 = 91,781.88 : x
  2. Step 2: Convert to fraction form
    92,623.88/138,122.29 = 91,781.88/x
  3. Step 3: Cross multiply
    92,623.88x = 138,122.29 × 91,781.88
  4. Step 4: Simplify right side
    92,623.88x = 12,677,123,446.11
  5. Step 5: Solve for x
    x = 12,677,123,446.11/92,623.88
  6. Step 6: Final answer
    x = 136,866.69

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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.