Home / 83,517.60-125,267.76-78,644.64

Finding the Fourth Proportional to 83,517.60, 125,267.76 and 78,644.64

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Solution

The fourth proportional to 83,517.60, 125,267.76 and 78,644.64 is: 117,958.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,517.60 : 125,267.76 = 78,644.64 : x
  2. Step 2: Convert to fraction form
    83,517.60/125,267.76 = 78,644.64/x
  3. Step 3: Cross multiply
    83,517.60x = 125,267.76 × 78,644.64
  4. Step 4: Simplify right side
    83,517.60x = 9,851,637,888.81
  5. Step 5: Solve for x
    x = 9,851,637,888.81/83,517.60
  6. Step 6: Final answer
    x = 117,958.82

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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.