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Finding the Fourth Proportional to 143,900.84, 198,582.26 and 80,239.40

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Solution

The fourth proportional to 143,900.84, 198,582.26 and 80,239.40 is: 110,729.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,900.84 : 198,582.26 = 80,239.40 : x
  2. Step 2: Convert to fraction form
    143,900.84/198,582.26 = 80,239.40/x
  3. Step 3: Cross multiply
    143,900.84x = 198,582.26 × 80,239.40
  4. Step 4: Simplify right side
    143,900.84x = 15,934,121,393.04
  5. Step 5: Solve for x
    x = 15,934,121,393.04/143,900.84
  6. Step 6: Final answer
    x = 110,729.87

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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.