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Finding the Fourth Proportional to 143,169.80, 197,565.90 and 79,503.80

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Solution

The fourth proportional to 143,169.80, 197,565.90 and 79,503.80 is: 109,710.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,169.80 : 197,565.90 = 79,503.80 : x
  2. Step 2: Convert to fraction form
    143,169.80/197,565.90 = 79,503.80/x
  3. Step 3: Cross multiply
    143,169.80x = 197,565.90 × 79,503.80
  4. Step 4: Simplify right side
    143,169.80x = 15,707,239,800.42
  5. Step 5: Solve for x
    x = 15,707,239,800.42/143,169.80
  6. Step 6: Final answer
    x = 109,710.57

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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.