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Finding the Fourth Proportional to 250,445.16, 375,690.90 and 90,561

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Solution

The fourth proportional to 250,445.16, 375,690.90 and 90,561 is: 135,849.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    250,445.16 : 375,690.90 = 90,561 : x
  2. Step 2: Convert to fraction form
    250,445.16/375,690.90 = 90,561/x
  3. Step 3: Cross multiply
    250,445.16x = 375,690.90 × 90,561
  4. Step 4: Simplify right side
    250,445.16x = 34,022,943,594.90
  5. Step 5: Solve for x
    x = 34,022,943,594.90/250,445.16
  6. Step 6: Final answer
    x = 135,849.87

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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.