Home / 142,872.12-197,168.20-79,215.84

Finding the Fourth Proportional to 142,872.12, 197,168.20 and 79,215.84

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Solution

The fourth proportional to 142,872.12, 197,168.20 and 79,215.84 is: 109,320.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,872.12 : 197,168.20 = 79,215.84 : x
  2. Step 2: Convert to fraction form
    142,872.12/197,168.20 = 79,215.84/x
  3. Step 3: Cross multiply
    142,872.12x = 197,168.20 × 79,215.84
  4. Step 4: Simplify right side
    142,872.12x = 15,618,844,584.29
  5. Step 5: Solve for x
    x = 15,618,844,584.29/142,872.12
  6. Step 6: Final answer
    x = 109,320.45

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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.