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Finding the Fourth Proportional to 61,644.90, 85,074.46 and 34,789.76

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Solution

The fourth proportional to 61,644.90, 85,074.46 and 34,789.76 is: 48,012.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,644.90 : 85,074.46 = 34,789.76 : x
  2. Step 2: Convert to fraction form
    61,644.90/85,074.46 = 34,789.76/x
  3. Step 3: Cross multiply
    61,644.90x = 85,074.46 × 34,789.76
  4. Step 4: Simplify right side
    61,644.90x = 2,959,719,533.18
  5. Step 5: Solve for x
    x = 2,959,719,533.18/61,644.90
  6. Step 6: Final answer
    x = 48,012.40

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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.