Home / 138,320.10-207,480.15-126,947.70

Finding the Fourth Proportional to 138,320.10, 207,480.15 and 126,947.70

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Solution

The fourth proportional to 138,320.10, 207,480.15 and 126,947.70 is: 190,421.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,320.10 : 207,480.15 = 126,947.70 : x
  2. Step 2: Convert to fraction form
    138,320.10/207,480.15 = 126,947.70/x
  3. Step 3: Cross multiply
    138,320.10x = 207,480.15 × 126,947.70
  4. Step 4: Simplify right side
    138,320.10x = 26,339,127,838.16
  5. Step 5: Solve for x
    x = 26,339,127,838.16/138,320.10
  6. Step 6: Final answer
    x = 190,421.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.