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Finding the Fourth Proportional to 81,997.79, 113,188.68 and 64,098.59

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Solution

The fourth proportional to 81,997.79, 113,188.68 and 64,098.59 is: 88,480.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,997.79 : 113,188.68 = 64,098.59 : x
  2. Step 2: Convert to fraction form
    81,997.79/113,188.68 = 64,098.59/x
  3. Step 3: Cross multiply
    81,997.79x = 113,188.68 × 64,098.59
  4. Step 4: Simplify right side
    81,997.79x = 7,255,234,226.02
  5. Step 5: Solve for x
    x = 7,255,234,226.02/81,997.79
  6. Step 6: Final answer
    x = 88,480.86

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1.5x scale

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.