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Finding the Fourth Proportional to 142,863.21, 197,156.03 and 79,197.21

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Solution

The fourth proportional to 142,863.21, 197,156.03 and 79,197.21 is: 109,294.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,863.21 : 197,156.03 = 79,197.21 : x
  2. Step 2: Convert to fraction form
    142,863.21/197,156.03 = 79,197.21/x
  3. Step 3: Cross multiply
    142,863.21x = 197,156.03 × 79,197.21
  4. Step 4: Simplify right side
    142,863.21x = 15,614,207,510.68
  5. Step 5: Solve for x
    x = 15,614,207,510.68/142,863.21
  6. Step 6: Final answer
    x = 109,294.81

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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.