Home / 142,747.38-196,993.90-78,212.40

Finding the Fourth Proportional to 142,747.38, 196,993.90 and 78,212.40

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Solution

The fourth proportional to 142,747.38, 196,993.90 and 78,212.40 is: 107,934.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,747.38 : 196,993.90 = 78,212.40 : x
  2. Step 2: Convert to fraction form
    142,747.38/196,993.90 = 78,212.40/x
  3. Step 3: Cross multiply
    142,747.38x = 196,993.90 × 78,212.40
  4. Step 4: Simplify right side
    142,747.38x = 15,407,365,063.40
  5. Step 5: Solve for x
    x = 15,407,365,063.40/142,747.38
  6. Step 6: Final answer
    x = 107,934.49

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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.