Home / 142,829.82-197,107.13-78,305.12

Finding the Fourth Proportional to 142,829.82, 197,107.13 and 78,305.12

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Solution

The fourth proportional to 142,829.82, 197,107.13 and 78,305.12 is: 108,062.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,829.82 : 197,107.13 = 78,305.12 : x
  2. Step 2: Convert to fraction form
    142,829.82/197,107.13 = 78,305.12/x
  3. Step 3: Cross multiply
    142,829.82x = 197,107.13 × 78,305.12
  4. Step 4: Simplify right side
    142,829.82x = 15,434,497,416.88
  5. Step 5: Solve for x
    x = 15,434,497,416.88/142,829.82
  6. Step 6: Final answer
    x = 108,062.15

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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.