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Finding the Fourth Proportional to 138,359.65, 206,393.01 and 134,280.89

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Solution

The fourth proportional to 138,359.65, 206,393.01 and 134,280.89 is: 200,308.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,359.65 : 206,393.01 = 134,280.89 : x
  2. Step 2: Convert to fraction form
    138,359.65/206,393.01 = 134,280.89/x
  3. Step 3: Cross multiply
    138,359.65x = 206,393.01 × 134,280.89
  4. Step 4: Simplify right side
    138,359.65x = 27,714,636,401.17
  5. Step 5: Solve for x
    x = 27,714,636,401.17/138,359.65
  6. Step 6: Final answer
    x = 200,308.66

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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.