Home / 138,815.70-191,565.45-75,153.48

Finding the Fourth Proportional to 138,815.70, 191,565.45 and 75,153.48

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Solution

The fourth proportional to 138,815.70, 191,565.45 and 75,153.48 is: 103,711.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,815.70 : 191,565.45 = 75,153.48 : x
  2. Step 2: Convert to fraction form
    138,815.70/191,565.45 = 75,153.48/x
  3. Step 3: Cross multiply
    138,815.70x = 191,565.45 × 75,153.48
  4. Step 4: Simplify right side
    138,815.70x = 14,396,810,215.27
  5. Step 5: Solve for x
    x = 14,396,810,215.27/138,815.70
  6. Step 6: Final answer
    x = 103,711.69

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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.