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Finding the Fourth Proportional to 143,987.52, 198,703.08 and 80,323.68

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Solution

The fourth proportional to 143,987.52, 198,703.08 and 80,323.68 is: 110,846.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,987.52 : 198,703.08 = 80,323.68 : x
  2. Step 2: Convert to fraction form
    143,987.52/198,703.08 = 80,323.68/x
  3. Step 3: Cross multiply
    143,987.52x = 198,703.08 × 80,323.68
  4. Step 4: Simplify right side
    143,987.52x = 15,960,562,612.93
  5. Step 5: Solve for x
    x = 15,960,562,612.93/143,987.52
  6. Step 6: Final answer
    x = 110,846.85

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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.