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Finding the Fourth Proportional to 83,976.40, 125,964.60 and 75,811.60

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Solution

The fourth proportional to 83,976.40, 125,964.60 and 75,811.60 is: 113,717.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,976.40 : 125,964.60 = 75,811.60 : x
  2. Step 2: Convert to fraction form
    83,976.40/125,964.60 = 75,811.60/x
  3. Step 3: Cross multiply
    83,976.40x = 125,964.60 × 75,811.60
  4. Step 4: Simplify right side
    83,976.40x = 9,549,577,869.36
  5. Step 5: Solve for x
    x = 9,549,577,869.36/83,976.40
  6. Step 6: Final answer
    x = 113,717.40

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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.