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Finding the Fourth Proportional to 68,685.88, 94,780.14 and 38,877.88

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Solution

The fourth proportional to 68,685.88, 94,780.14 and 38,877.88 is: 53,647.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,685.88 : 94,780.14 = 38,877.88 : x
  2. Step 2: Convert to fraction form
    68,685.88/94,780.14 = 38,877.88/x
  3. Step 3: Cross multiply
    68,685.88x = 94,780.14 × 38,877.88
  4. Step 4: Simplify right side
    68,685.88x = 3,684,850,909.30
  5. Step 5: Solve for x
    x = 3,684,850,909.30/68,685.88
  6. Step 6: Final answer
    x = 53,647.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.