Home / 138,872.20-207,088.85-137,609.20

Finding the Fourth Proportional to 138,872.20, 207,088.85 and 137,609.20

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Solution

The fourth proportional to 138,872.20, 207,088.85 and 137,609.20 is: 205,205.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,872.20 : 207,088.85 = 137,609.20 : x
  2. Step 2: Convert to fraction form
    138,872.20/207,088.85 = 137,609.20/x
  3. Step 3: Cross multiply
    138,872.20x = 207,088.85 × 137,609.20
  4. Step 4: Simplify right side
    138,872.20x = 28,497,330,977.42
  5. Step 5: Solve for x
    x = 28,497,330,977.42/138,872.20
  6. Step 6: Final answer
    x = 205,205.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.