Home / 80,719.60-121,115.40-28,166.80

Finding the Fourth Proportional to 80,719.60, 121,115.40 and 28,166.80

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Solution

The fourth proportional to 80,719.60, 121,115.40 and 28,166.80 is: 42,262.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,719.60 : 121,115.40 = 28,166.80 : x
  2. Step 2: Convert to fraction form
    80,719.60/121,115.40 = 28,166.80/x
  3. Step 3: Cross multiply
    80,719.60x = 121,115.40 × 28,166.80
  4. Step 4: Simplify right side
    80,719.60x = 3,411,433,248.72
  5. Step 5: Solve for x
    x = 3,411,433,248.72/80,719.60
  6. Step 6: Final answer
    x = 42,262.76

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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.