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Finding the Fourth Proportional to 138,311.40, 207,098.04 and 138,311.40

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Solution

The fourth proportional to 138,311.40, 207,098.04 and 138,311.40 is: 207,098.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,311.40 : 207,098.04 = 138,311.40 : x
  2. Step 2: Convert to fraction form
    138,311.40/207,098.04 = 138,311.40/x
  3. Step 3: Cross multiply
    138,311.40x = 207,098.04 × 138,311.40
  4. Step 4: Simplify right side
    138,311.40x = 28,644,019,849.66
  5. Step 5: Solve for x
    x = 28,644,019,849.66/138,311.40
  6. Step 6: Final answer
    x = 207,098.04

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1.5x scale

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.