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Finding the Fourth Proportional to 65,753.28, 90,781.68 and 58,667.28

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Solution

The fourth proportional to 65,753.28, 90,781.68 and 58,667.28 is: 80,998.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,753.28 : 90,781.68 = 58,667.28 : x
  2. Step 2: Convert to fraction form
    65,753.28/90,781.68 = 58,667.28/x
  3. Step 3: Cross multiply
    65,753.28x = 90,781.68 × 58,667.28
  4. Step 4: Simplify right side
    65,753.28x = 5,325,914,239.43
  5. Step 5: Solve for x
    x = 5,325,914,239.43/65,753.28
  6. Step 6: Final answer
    x = 80,998.46

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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.