Home / 142,839.94-197,114.85-78,306.97

Finding the Fourth Proportional to 142,839.94, 197,114.85 and 78,306.97

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Solution

The fourth proportional to 142,839.94, 197,114.85 and 78,306.97 is: 108,061.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,839.94 : 197,114.85 = 78,306.97 : x
  2. Step 2: Convert to fraction form
    142,839.94/197,114.85 = 78,306.97/x
  3. Step 3: Cross multiply
    142,839.94x = 197,114.85 × 78,306.97
  4. Step 4: Simplify right side
    142,839.94x = 15,435,467,408.31
  5. Step 5: Solve for x
    x = 15,435,467,408.31/142,839.94
  6. Step 6: Final answer
    x = 108,061.28

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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.