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Finding the Fourth Proportional to 90,480.67, 135,674.62 and 47,809.01

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Solution

The fourth proportional to 90,480.67, 135,674.62 and 47,809.01 is: 71,689.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,480.67 : 135,674.62 = 47,809.01 : x
  2. Step 2: Convert to fraction form
    90,480.67/135,674.62 = 47,809.01/x
  3. Step 3: Cross multiply
    90,480.67x = 135,674.62 × 47,809.01
  4. Step 4: Simplify right side
    90,480.67x = 6,486,469,264.33
  5. Step 5: Solve for x
    x = 6,486,469,264.33/90,480.67
  6. Step 6: Final answer
    x = 71,689.01

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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.