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Finding the Fourth Proportional to 61,778.87, 85,256.16 and 34,919.78

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Solution

The fourth proportional to 61,778.87, 85,256.16 and 34,919.78 is: 48,190.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,778.87 : 85,256.16 = 34,919.78 : x
  2. Step 2: Convert to fraction form
    61,778.87/85,256.16 = 34,919.78/x
  3. Step 3: Cross multiply
    61,778.87x = 85,256.16 × 34,919.78
  4. Step 4: Simplify right side
    61,778.87x = 2,977,126,113.33
  5. Step 5: Solve for x
    x = 2,977,126,113.33/61,778.87
  6. Step 6: Final answer
    x = 48,190.04

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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.