Home / 138,617.20-207,925.80-75,631.60

Finding the Fourth Proportional to 138,617.20, 207,925.80 and 75,631.60

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Solution

The fourth proportional to 138,617.20, 207,925.80 and 75,631.60 is: 113,447.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,617.20 : 207,925.80 = 75,631.60 : x
  2. Step 2: Convert to fraction form
    138,617.20/207,925.80 = 75,631.60/x
  3. Step 3: Cross multiply
    138,617.20x = 207,925.80 × 75,631.60
  4. Step 4: Simplify right side
    138,617.20x = 15,725,760,935.28
  5. Step 5: Solve for x
    x = 15,725,760,935.28/138,617.20
  6. Step 6: Final answer
    x = 113,447.40

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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.