Home / 84,689.20-126,952.80-31,366.90

Finding the Fourth Proportional to 84,689.20, 126,952.80 and 31,366.90

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Solution

The fourth proportional to 84,689.20, 126,952.80 and 31,366.90 is: 47,020.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,689.20 : 126,952.80 = 31,366.90 : x
  2. Step 2: Convert to fraction form
    84,689.20/126,952.80 = 31,366.90/x
  3. Step 3: Cross multiply
    84,689.20x = 126,952.80 × 31,366.90
  4. Step 4: Simplify right side
    84,689.20x = 3,982,115,782.32
  5. Step 5: Solve for x
    x = 3,982,115,782.32/84,689.20
  6. Step 6: Final answer
    x = 47,020.35

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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.