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Finding the Fourth Proportional to 143,138.14, 197,524.65 and 79,472.14

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Solution

The fourth proportional to 143,138.14, 197,524.65 and 79,472.14 is: 109,668.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,138.14 : 197,524.65 = 79,472.14 : x
  2. Step 2: Convert to fraction form
    143,138.14/197,524.65 = 79,472.14/x
  3. Step 3: Cross multiply
    143,138.14x = 197,524.65 × 79,472.14
  4. Step 4: Simplify right side
    143,138.14x = 15,697,706,638.25
  5. Step 5: Solve for x
    x = 15,697,706,638.25/143,138.14
  6. Step 6: Final answer
    x = 109,668.23

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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.