Home / 142,979.39-197,335.22-79,337.69

Finding the Fourth Proportional to 142,979.39, 197,335.22 and 79,337.69

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Solution

The fourth proportional to 142,979.39, 197,335.22 and 79,337.69 is: 109,499.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,979.39 : 197,335.22 = 79,337.69 : x
  2. Step 2: Convert to fraction form
    142,979.39/197,335.22 = 79,337.69/x
  3. Step 3: Cross multiply
    142,979.39x = 197,335.22 × 79,337.69
  4. Step 4: Simplify right side
    142,979.39x = 15,656,120,607.09
  5. Step 5: Solve for x
    x = 15,656,120,607.09/142,979.39
  6. Step 6: Final answer
    x = 109,499.14

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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.