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Finding the Fourth Proportional to 83,887.60, 125,539.80 and 76,889.20

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Solution

The fourth proportional to 83,887.60, 125,539.80 and 76,889.20 is: 115,066.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,887.60 : 125,539.80 = 76,889.20 : x
  2. Step 2: Convert to fraction form
    83,887.60/125,539.80 = 76,889.20/x
  3. Step 3: Cross multiply
    83,887.60x = 125,539.80 × 76,889.20
  4. Step 4: Simplify right side
    83,887.60x = 9,652,654,790.16
  5. Step 5: Solve for x
    x = 9,652,654,790.16/83,887.60
  6. Step 6: Final answer
    x = 115,066.53

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1.5x scale

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.