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Finding the Fourth Proportional to 138,154.40, 207,231.60 and 49,410.80

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Solution

The fourth proportional to 138,154.40, 207,231.60 and 49,410.80 is: 74,116.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,154.40 : 207,231.60 = 49,410.80 : x
  2. Step 2: Convert to fraction form
    138,154.40/207,231.60 = 49,410.80/x
  3. Step 3: Cross multiply
    138,154.40x = 207,231.60 × 49,410.80
  4. Step 4: Simplify right side
    138,154.40x = 10,239,479,141.28
  5. Step 5: Solve for x
    x = 10,239,479,141.28/138,154.40
  6. Step 6: Final answer
    x = 74,116.20

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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.