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Finding the Fourth Proportional to 61,611.31, 85,023.95 and 34,388.63

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Solution

The fourth proportional to 61,611.31, 85,023.95 and 34,388.63 is: 47,456.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,611.31 : 85,023.95 = 34,388.63 : x
  2. Step 2: Convert to fraction form
    61,611.31/85,023.95 = 34,388.63/x
  3. Step 3: Cross multiply
    61,611.31x = 85,023.95 × 34,388.63
  4. Step 4: Simplify right side
    61,611.31x = 2,923,856,930.49
  5. Step 5: Solve for x
    x = 2,923,856,930.49/61,611.31
  6. Step 6: Final answer
    x = 47,456.50

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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.