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Finding the Fourth Proportional to 68,964.20, 103,470.60 and 66,534.20

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Solution

The fourth proportional to 68,964.20, 103,470.60 and 66,534.20 is: 99,824.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,964.20 : 103,470.60 = 66,534.20 : x
  2. Step 2: Convert to fraction form
    68,964.20/103,470.60 = 66,534.20/x
  3. Step 3: Cross multiply
    68,964.20x = 103,470.60 × 66,534.20
  4. Step 4: Simplify right side
    68,964.20x = 6,884,333,594.52
  5. Step 5: Solve for x
    x = 6,884,333,594.52/68,964.20
  6. Step 6: Final answer
    x = 99,824.74

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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.