Home / 142,845.98-197,126.11-78,318.79

Finding the Fourth Proportional to 142,845.98, 197,126.11 and 78,318.79

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Solution

The fourth proportional to 142,845.98, 197,126.11 and 78,318.79 is: 108,079.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,845.98 : 197,126.11 = 78,318.79 : x
  2. Step 2: Convert to fraction form
    142,845.98/197,126.11 = 78,318.79/x
  3. Step 3: Cross multiply
    142,845.98x = 197,126.11 × 78,318.79
  4. Step 4: Simplify right side
    142,845.98x = 15,438,678,017.69
  5. Step 5: Solve for x
    x = 15,438,678,017.69/142,845.98
  6. Step 6: Final answer
    x = 108,079.20

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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.