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Finding the Fourth Proportional to 90,679, 136,037.94 and 38,132.68

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Solution

The fourth proportional to 90,679, 136,037.94 and 38,132.68 is: 57,207.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,679 : 136,037.94 = 38,132.68 : x
  2. Step 2: Convert to fraction form
    90,679/136,037.94 = 38,132.68/x
  3. Step 3: Cross multiply
    90,679x = 136,037.94 × 38,132.68
  4. Step 4: Simplify right side
    90,679x = 5,187,491,233.88
  5. Step 5: Solve for x
    x = 5,187,491,233.88/90,679
  6. Step 6: Final answer
    x = 57,207.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.