Home / 68,862.20-103,439.10-66,383.60

Finding the Fourth Proportional to 68,862.20, 103,439.10 and 66,383.60

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Solution

The fourth proportional to 68,862.20, 103,439.10 and 66,383.60 is: 99,715.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,862.20 : 103,439.10 = 66,383.60 : x
  2. Step 2: Convert to fraction form
    68,862.20/103,439.10 = 66,383.60/x
  3. Step 3: Cross multiply
    68,862.20x = 103,439.10 × 66,383.60
  4. Step 4: Simplify right side
    68,862.20x = 6,866,659,838.76
  5. Step 5: Solve for x
    x = 6,866,659,838.76/68,862.20
  6. Step 6: Final answer
    x = 99,715.95

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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.