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Finding the Fourth Proportional to 90,672.78, 125,027.50 and 61,997.16

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Solution

The fourth proportional to 90,672.78, 125,027.50 and 61,997.16 is: 85,487.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,672.78 : 125,027.50 = 61,997.16 : x
  2. Step 2: Convert to fraction form
    90,672.78/125,027.50 = 61,997.16/x
  3. Step 3: Cross multiply
    90,672.78x = 125,027.50 × 61,997.16
  4. Step 4: Simplify right side
    90,672.78x = 7,751,350,352.00
  5. Step 5: Solve for x
    x = 7,751,350,352.00/90,672.78
  6. Step 6: Final answer
    x = 85,487.07

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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.