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Finding the Fourth Proportional to 68,854.88, 103,281.03 and 18,934.76

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Solution

The fourth proportional to 68,854.88, 103,281.03 and 18,934.76 is: 28,401.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,854.88 : 103,281.03 = 18,934.76 : x
  2. Step 2: Convert to fraction form
    68,854.88/103,281.03 = 18,934.76/x
  3. Step 3: Cross multiply
    68,854.88x = 103,281.03 × 18,934.76
  4. Step 4: Simplify right side
    68,854.88x = 1,955,600,999.20
  5. Step 5: Solve for x
    x = 1,955,600,999.20/68,854.88
  6. Step 6: Final answer
    x = 28,401.78

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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.