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Finding the Fourth Proportional to 138,500.48, 191,131.50 and 87,535.79

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Solution

The fourth proportional to 138,500.48, 191,131.50 and 87,535.79 is: 120,799.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,500.48 : 191,131.50 = 87,535.79 : x
  2. Step 2: Convert to fraction form
    138,500.48/191,131.50 = 87,535.79/x
  3. Step 3: Cross multiply
    138,500.48x = 191,131.50 × 87,535.79
  4. Step 4: Simplify right side
    138,500.48x = 16,730,846,443.34
  5. Step 5: Solve for x
    x = 16,730,846,443.34/138,500.48
  6. Step 6: Final answer
    x = 120,799.91

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