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Finding the Fourth Proportional to 138,158.40, 207,237.60 and 135,086.40

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Solution

The fourth proportional to 138,158.40, 207,237.60 and 135,086.40 is: 202,629.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,158.40 : 207,237.60 = 135,086.40 : x
  2. Step 2: Convert to fraction form
    138,158.40/207,237.60 = 135,086.40/x
  3. Step 3: Cross multiply
    138,158.40x = 207,237.60 × 135,086.40
  4. Step 4: Simplify right side
    138,158.40x = 27,994,981,328.64
  5. Step 5: Solve for x
    x = 27,994,981,328.64/138,158.40
  6. Step 6: Final answer
    x = 202,629.60

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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.