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Finding the Fourth Proportional to 80,106.60, 120,159.90 and 76,693.80

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Solution

The fourth proportional to 80,106.60, 120,159.90 and 76,693.80 is: 115,040.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,106.60 : 120,159.90 = 76,693.80 : x
  2. Step 2: Convert to fraction form
    80,106.60/120,159.90 = 76,693.80/x
  3. Step 3: Cross multiply
    80,106.60x = 120,159.90 × 76,693.80
  4. Step 4: Simplify right side
    80,106.60x = 9,215,519,338.62
  5. Step 5: Solve for x
    x = 9,215,519,338.62/80,106.60
  6. Step 6: Final answer
    x = 115,040.70

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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.