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Finding the Fourth Proportional to 143,987.63, 198,708.32 and 80,337.69

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Solution

The fourth proportional to 143,987.63, 198,708.32 and 80,337.69 is: 110,869.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,987.63 : 198,708.32 = 80,337.69 : x
  2. Step 2: Convert to fraction form
    143,987.63/198,708.32 = 80,337.69/x
  3. Step 3: Cross multiply
    143,987.63x = 198,708.32 × 80,337.69
  4. Step 4: Simplify right side
    143,987.63x = 15,963,767,613.43
  5. Step 5: Solve for x
    x = 15,963,767,613.43/143,987.63
  6. Step 6: Final answer
    x = 110,869.03

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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.