Home / 84,688.20-126,951.30-31,365.90

Finding the Fourth Proportional to 84,688.20, 126,951.30 and 31,365.90

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Solution

The fourth proportional to 84,688.20, 126,951.30 and 31,365.90 is: 47,018.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,688.20 : 126,951.30 = 31,365.90 : x
  2. Step 2: Convert to fraction form
    84,688.20/126,951.30 = 31,365.90/x
  3. Step 3: Cross multiply
    84,688.20x = 126,951.30 × 31,365.90
  4. Step 4: Simplify right side
    84,688.20x = 3,981,941,780.67
  5. Step 5: Solve for x
    x = 3,981,941,780.67/84,688.20
  6. Step 6: Final answer
    x = 47,018.85

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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.