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Finding the Fourth Proportional to 143,878.98, 198,555.48 and 80,209.74

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Solution

The fourth proportional to 143,878.98, 198,555.48 and 80,209.74 is: 110,690.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,878.98 : 198,555.48 = 80,209.74 : x
  2. Step 2: Convert to fraction form
    143,878.98/198,555.48 = 80,209.74/x
  3. Step 3: Cross multiply
    143,878.98x = 198,555.48 × 80,209.74
  4. Step 4: Simplify right side
    143,878.98x = 15,926,083,426.38
  5. Step 5: Solve for x
    x = 15,926,083,426.38/143,878.98
  6. Step 6: Final answer
    x = 110,690.83

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1.5x scale

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.