Home / 80,981.70-121,383.45-28,364.10

Finding the Fourth Proportional to 80,981.70, 121,383.45 and 28,364.10

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Solution

The fourth proportional to 80,981.70, 121,383.45 and 28,364.10 is: 42,514.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,981.70 : 121,383.45 = 28,364.10 : x
  2. Step 2: Convert to fraction form
    80,981.70/121,383.45 = 28,364.10/x
  3. Step 3: Cross multiply
    80,981.70x = 121,383.45 × 28,364.10
  4. Step 4: Simplify right side
    80,981.70x = 3,442,932,314.15
  5. Step 5: Solve for x
    x = 3,442,932,314.15/80,981.70
  6. Step 6: Final answer
    x = 42,514.94

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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.