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Finding the Fourth Proportional to 142,858.12, 197,154.12 and 79,201.84

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Solution

The fourth proportional to 142,858.12, 197,154.12 and 79,201.84 is: 109,304.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,858.12 : 197,154.12 = 79,201.84 : x
  2. Step 2: Convert to fraction form
    142,858.12/197,154.12 = 79,201.84/x
  3. Step 3: Cross multiply
    142,858.12x = 197,154.12 × 79,201.84
  4. Step 4: Simplify right side
    142,858.12x = 15,614,969,067.58
  5. Step 5: Solve for x
    x = 15,614,969,067.58/142,858.12
  6. Step 6: Final answer
    x = 109,304.04

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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.