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Finding the Fourth Proportional to 145,422.78, 218,139.05 and 40,232.94

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Solution

The fourth proportional to 145,422.78, 218,139.05 and 40,232.94 is: 60,350.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,422.78 : 218,139.05 = 40,232.94 : x
  2. Step 2: Convert to fraction form
    145,422.78/218,139.05 = 40,232.94/x
  3. Step 3: Cross multiply
    145,422.78x = 218,139.05 × 40,232.94
  4. Step 4: Simplify right side
    145,422.78x = 8,776,375,310.31
  5. Step 5: Solve for x
    x = 8,776,375,310.31/145,422.78
  6. Step 6: Final answer
    x = 60,350.76

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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.