Home / 81,311.40-121,966.20-22,146.66

Finding the Fourth Proportional to 81,311.40, 121,966.20 and 22,146.66

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Solution

The fourth proportional to 81,311.40, 121,966.20 and 22,146.66 is: 33,219.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,311.40 : 121,966.20 = 22,146.66 : x
  2. Step 2: Convert to fraction form
    81,311.40/121,966.20 = 22,146.66/x
  3. Step 3: Cross multiply
    81,311.40x = 121,966.20 × 22,146.66
  4. Step 4: Simplify right side
    81,311.40x = 2,701,143,962.89
  5. Step 5: Solve for x
    x = 2,701,143,962.89/81,311.40
  6. Step 6: Final answer
    x = 33,219.74

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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.