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Finding the Fourth Proportional to 68,932.20, 103,422.60 and 66,502.20

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Solution

The fourth proportional to 68,932.20, 103,422.60 and 66,502.20 is: 99,776.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,932.20 : 103,422.60 = 66,502.20 : x
  2. Step 2: Convert to fraction form
    68,932.20/103,422.60 = 66,502.20/x
  3. Step 3: Cross multiply
    68,932.20x = 103,422.60 × 66,502.20
  4. Step 4: Simplify right side
    68,932.20x = 6,877,830,429.72
  5. Step 5: Solve for x
    x = 6,877,830,429.72/68,932.20
  6. Step 6: Final answer
    x = 99,776.74

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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.