Home / 80,981.40-121,385.70-31,042.20

Finding the Fourth Proportional to 80,981.40, 121,385.70 and 31,042.20

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Solution

The fourth proportional to 80,981.40, 121,385.70 and 31,042.20 is: 46,530.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,981.40 : 121,385.70 = 31,042.20 : x
  2. Step 2: Convert to fraction form
    80,981.40/121,385.70 = 31,042.20/x
  3. Step 3: Cross multiply
    80,981.40x = 121,385.70 × 31,042.20
  4. Step 4: Simplify right side
    80,981.40x = 3,768,079,176.54
  5. Step 5: Solve for x
    x = 3,768,079,176.54/80,981.40
  6. Step 6: Final answer
    x = 46,530.18

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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.