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Finding the Fourth Proportional to 143,542.95, 215,096.10 and 68,559.84

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Solution

The fourth proportional to 143,542.95, 215,096.10 and 68,559.84 is: 102,735.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,542.95 : 215,096.10 = 68,559.84 : x
  2. Step 2: Convert to fraction form
    143,542.95/215,096.10 = 68,559.84/x
  3. Step 3: Cross multiply
    143,542.95x = 215,096.10 × 68,559.84
  4. Step 4: Simplify right side
    143,542.95x = 14,746,954,200.62
  5. Step 5: Solve for x
    x = 14,746,954,200.62/143,542.95
  6. Step 6: Final answer
    x = 102,735.48

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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.