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Finding the Fourth Proportional to 90,073.91, 135,064.95 and 30,080.79

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Solution

The fourth proportional to 90,073.91, 135,064.95 and 30,080.79 is: 45,105.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,073.91 : 135,064.95 = 30,080.79 : x
  2. Step 2: Convert to fraction form
    90,073.91/135,064.95 = 30,080.79/x
  3. Step 3: Cross multiply
    90,073.91x = 135,064.95 × 30,080.79
  4. Step 4: Simplify right side
    90,073.91x = 4,062,860,397.31
  5. Step 5: Solve for x
    x = 4,062,860,397.31/90,073.91
  6. Step 6: Final answer
    x = 45,105.85

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1.5x scale

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.