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Finding the Fourth Proportional to 143,668.88, 198,281.16 and 87,073.04

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Solution

The fourth proportional to 143,668.88, 198,281.16 and 87,073.04 is: 120,171.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,668.88 : 198,281.16 = 87,073.04 : x
  2. Step 2: Convert to fraction form
    143,668.88/198,281.16 = 87,073.04/x
  3. Step 3: Cross multiply
    143,668.88x = 198,281.16 × 87,073.04
  4. Step 4: Simplify right side
    143,668.88x = 17,264,943,375.93
  5. Step 5: Solve for x
    x = 17,264,943,375.93/143,668.88
  6. Step 6: Final answer
    x = 120,171.77

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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.