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Finding the Fourth Proportional to 90,020.91, 135,116.12 and 45,679.48

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Solution

The fourth proportional to 90,020.91, 135,116.12 and 45,679.48 is: 68,562.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,020.91 : 135,116.12 = 45,679.48 : x
  2. Step 2: Convert to fraction form
    90,020.91/135,116.12 = 45,679.48/x
  3. Step 3: Cross multiply
    90,020.91x = 135,116.12 × 45,679.48
  4. Step 4: Simplify right side
    90,020.91x = 6,172,034,101.22
  5. Step 5: Solve for x
    x = 6,172,034,101.22/90,020.91
  6. Step 6: Final answer
    x = 68,562.23

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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.