Home / 138,453.40-207,531.78-98,890.48

Finding the Fourth Proportional to 138,453.40, 207,531.78 and 98,890.48

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Solution

The fourth proportional to 138,453.40, 207,531.78 and 98,890.48 is: 148,229.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,453.40 : 207,531.78 = 98,890.48 : x
  2. Step 2: Convert to fraction form
    138,453.40/207,531.78 = 98,890.48/x
  3. Step 3: Cross multiply
    138,453.40x = 207,531.78 × 98,890.48
  4. Step 4: Simplify right side
    138,453.40x = 20,522,917,339.45
  5. Step 5: Solve for x
    x = 20,522,917,339.45/138,453.40
  6. Step 6: Final answer
    x = 148,229.78

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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.