Home / 81,948.10-122,922.15-80,781.70

Finding the Fourth Proportional to 81,948.10, 122,922.15 and 80,781.70

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Solution

The fourth proportional to 81,948.10, 122,922.15 and 80,781.70 is: 121,172.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,948.10 : 122,922.15 = 80,781.70 : x
  2. Step 2: Convert to fraction form
    81,948.10/122,922.15 = 80,781.70/x
  3. Step 3: Cross multiply
    81,948.10x = 122,922.15 × 80,781.70
  4. Step 4: Simplify right side
    81,948.10x = 9,929,860,244.66
  5. Step 5: Solve for x
    x = 9,929,860,244.66/81,948.10
  6. Step 6: Final answer
    x = 121,172.55

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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.