Home / 80,948.20-121,422.30-68,117.80

Finding the Fourth Proportional to 80,948.20, 121,422.30 and 68,117.80

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Solution

The fourth proportional to 80,948.20, 121,422.30 and 68,117.80 is: 102,176.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,948.20 : 121,422.30 = 68,117.80 : x
  2. Step 2: Convert to fraction form
    80,948.20/121,422.30 = 68,117.80/x
  3. Step 3: Cross multiply
    80,948.20x = 121,422.30 × 68,117.80
  4. Step 4: Simplify right side
    80,948.20x = 8,271,019,946.94
  5. Step 5: Solve for x
    x = 8,271,019,946.94/80,948.20
  6. Step 6: Final answer
    x = 102,176.70

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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.