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Finding the Fourth Proportional to 143,998.90, 215,998.35 and 108,517.30

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Solution

The fourth proportional to 143,998.90, 215,998.35 and 108,517.30 is: 162,775.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,998.90 : 215,998.35 = 108,517.30 : x
  2. Step 2: Convert to fraction form
    143,998.90/215,998.35 = 108,517.30/x
  3. Step 3: Cross multiply
    143,998.90x = 215,998.35 × 108,517.30
  4. Step 4: Simplify right side
    143,998.90x = 23,439,557,746.46
  5. Step 5: Solve for x
    x = 23,439,557,746.46/143,998.90
  6. Step 6: Final answer
    x = 162,775.95

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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.