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Finding the Fourth Proportional to 143,902.80, 215,854.20 and 91,414.80

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Solution

The fourth proportional to 143,902.80, 215,854.20 and 91,414.80 is: 137,122.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,902.80 : 215,854.20 = 91,414.80 : x
  2. Step 2: Convert to fraction form
    143,902.80/215,854.20 = 91,414.80/x
  3. Step 3: Cross multiply
    143,902.80x = 215,854.20 × 91,414.80
  4. Step 4: Simplify right side
    143,902.80x = 19,732,268,522.16
  5. Step 5: Solve for x
    x = 19,732,268,522.16/143,902.80
  6. Step 6: Final answer
    x = 137,122.20

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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.