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Finding the Fourth Proportional to 68,779.85, 94,915.82 and 38,565.14

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Solution

The fourth proportional to 68,779.85, 94,915.82 and 38,565.14 is: 53,219.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,779.85 : 94,915.82 = 38,565.14 : x
  2. Step 2: Convert to fraction form
    68,779.85/94,915.82 = 38,565.14/x
  3. Step 3: Cross multiply
    68,779.85x = 94,915.82 × 38,565.14
  4. Step 4: Simplify right side
    68,779.85x = 3,660,441,508.35
  5. Step 5: Solve for x
    x = 3,660,441,508.35/68,779.85
  6. Step 6: Final answer
    x = 53,219.68

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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.