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Finding the Fourth Proportional to 155,515.78, 214,611.75 and 88,447.78

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Solution

The fourth proportional to 155,515.78, 214,611.75 and 88,447.78 is: 122,057.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,515.78 : 214,611.75 = 88,447.78 : x
  2. Step 2: Convert to fraction form
    155,515.78/214,611.75 = 88,447.78/x
  3. Step 3: Cross multiply
    155,515.78x = 214,611.75 × 88,447.78
  4. Step 4: Simplify right side
    155,515.78x = 18,981,932,849.42
  5. Step 5: Solve for x
    x = 18,981,932,849.42/155,515.78
  6. Step 6: Final answer
    x = 122,057.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.