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Finding the Fourth Proportional to 90,551.93, 135,797.13 and 31,373.78

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Solution

The fourth proportional to 90,551.93, 135,797.13 and 31,373.78 is: 47,050.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,551.93 : 135,797.13 = 31,373.78 : x
  2. Step 2: Convert to fraction form
    90,551.93/135,797.13 = 31,373.78/x
  3. Step 3: Cross multiply
    90,551.93x = 135,797.13 × 31,373.78
  4. Step 4: Simplify right side
    90,551.93x = 4,260,469,699.18
  5. Step 5: Solve for x
    x = 4,260,469,699.18/90,551.93
  6. Step 6: Final answer
    x = 47,050.02

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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.