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Finding the Fourth Proportional to 61,738.60, 85,200.78 and 34,881.70

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Solution

The fourth proportional to 61,738.60, 85,200.78 and 34,881.70 is: 48,137.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,738.60 : 85,200.78 = 34,881.70 : x
  2. Step 2: Convert to fraction form
    61,738.60/85,200.78 = 34,881.70/x
  3. Step 3: Cross multiply
    61,738.60x = 85,200.78 × 34,881.70
  4. Step 4: Simplify right side
    61,738.60x = 2,971,948,047.73
  5. Step 5: Solve for x
    x = 2,971,948,047.73/61,738.60
  6. Step 6: Final answer
    x = 48,137.60

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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.