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Finding the Fourth Proportional to 138,764.98, 191,495.67 and 75,102.78

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Solution

The fourth proportional to 138,764.98, 191,495.67 and 75,102.78 is: 103,641.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,764.98 : 191,495.67 = 75,102.78 : x
  2. Step 2: Convert to fraction form
    138,764.98/191,495.67 = 75,102.78/x
  3. Step 3: Cross multiply
    138,764.98x = 191,495.67 × 75,102.78
  4. Step 4: Simplify right side
    138,764.98x = 14,381,857,174.96
  5. Step 5: Solve for x
    x = 14,381,857,174.96/138,764.98
  6. Step 6: Final answer
    x = 103,641.83

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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.