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Finding the Fourth Proportional to 138,658.64, 191,348.93 and 74,996.43

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Solution

The fourth proportional to 138,658.64, 191,348.93 and 74,996.43 is: 103,495.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,658.64 : 191,348.93 = 74,996.43 : x
  2. Step 2: Convert to fraction form
    138,658.64/191,348.93 = 74,996.43/x
  3. Step 3: Cross multiply
    138,658.64x = 191,348.93 × 74,996.43
  4. Step 4: Simplify right side
    138,658.64x = 14,350,487,180.59
  5. Step 5: Solve for x
    x = 14,350,487,180.59/138,658.64
  6. Step 6: Final answer
    x = 103,495.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.