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Finding the Fourth Proportional to 61,779.87, 85,257.54 and 34,920.78

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Solution

The fourth proportional to 61,779.87, 85,257.54 and 34,920.78 is: 48,191.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,779.87 : 85,257.54 = 34,920.78 : x
  2. Step 2: Convert to fraction form
    61,779.87/85,257.54 = 34,920.78/x
  3. Step 3: Cross multiply
    61,779.87x = 85,257.54 × 34,920.78
  4. Step 4: Simplify right side
    61,779.87x = 2,977,259,797.68
  5. Step 5: Solve for x
    x = 2,977,259,797.68/61,779.87
  6. Step 6: Final answer
    x = 48,191.42

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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.