Home / 115,487.20-159,367.76-72,489.60

Finding the Fourth Proportional to 115,487.20, 159,367.76 and 72,489.60

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Solution

The fourth proportional to 115,487.20, 159,367.76 and 72,489.60 is: 100,032.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,487.20 : 159,367.76 = 72,489.60 : x
  2. Step 2: Convert to fraction form
    115,487.20/159,367.76 = 72,489.60/x
  3. Step 3: Cross multiply
    115,487.20x = 159,367.76 × 72,489.60
  4. Step 4: Simplify right side
    115,487.20x = 11,552,505,175.30
  5. Step 5: Solve for x
    x = 11,552,505,175.30/115,487.20
  6. Step 6: Final answer
    x = 100,032.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.