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Finding the Fourth Proportional to 138,629.60, 207,944.40 and 124,114.40

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Solution

The fourth proportional to 138,629.60, 207,944.40 and 124,114.40 is: 186,171.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,629.60 : 207,944.40 = 124,114.40 : x
  2. Step 2: Convert to fraction form
    138,629.60/207,944.40 = 124,114.40/x
  3. Step 3: Cross multiply
    138,629.60x = 207,944.40 × 124,114.40
  4. Step 4: Simplify right side
    138,629.60x = 25,808,894,439.36
  5. Step 5: Solve for x
    x = 25,808,894,439.36/138,629.60
  6. Step 6: Final answer
    x = 186,171.60

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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.