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Finding the Fourth Proportional to 143,885.75, 198,480.92 and 90,077.31

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Solution

The fourth proportional to 143,885.75, 198,480.92 and 90,077.31 is: 124,255.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,885.75 : 198,480.92 = 90,077.31 : x
  2. Step 2: Convert to fraction form
    143,885.75/198,480.92 = 90,077.31/x
  3. Step 3: Cross multiply
    143,885.75x = 198,480.92 × 90,077.31
  4. Step 4: Simplify right side
    143,885.75x = 17,878,626,909.54
  5. Step 5: Solve for x
    x = 17,878,626,909.54/143,885.75
  6. Step 6: Final answer
    x = 124,255.72

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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.