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Finding the Fourth Proportional to 143,894.42, 215,718.53 and 55,211.57

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Solution

The fourth proportional to 143,894.42, 215,718.53 and 55,211.57 is: 82,770.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,894.42 : 215,718.53 = 55,211.57 : x
  2. Step 2: Convert to fraction form
    143,894.42/215,718.53 = 55,211.57/x
  3. Step 3: Cross multiply
    143,894.42x = 215,718.53 × 55,211.57
  4. Step 4: Simplify right side
    143,894.42x = 11,910,157,640.80
  5. Step 5: Solve for x
    x = 11,910,157,640.80/143,894.42
  6. Step 6: Final answer
    x = 82,770.12

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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.