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Finding the Fourth Proportional to 142,750.62, 213,939.90 and 79,568.19

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Solution

The fourth proportional to 142,750.62, 213,939.90 and 79,568.19 is: 119,248.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,750.62 : 213,939.90 = 79,568.19 : x
  2. Step 2: Convert to fraction form
    142,750.62/213,939.90 = 79,568.19/x
  3. Step 3: Cross multiply
    142,750.62x = 213,939.90 × 79,568.19
  4. Step 4: Simplify right side
    142,750.62x = 17,022,810,611.78
  5. Step 5: Solve for x
    x = 17,022,810,611.78/142,750.62
  6. Step 6: Final answer
    x = 119,248.59

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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.