Home / 142,204.85-196,242.58-78,542.66

Finding the Fourth Proportional to 142,204.85, 196,242.58 and 78,542.66

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Solution

The fourth proportional to 142,204.85, 196,242.58 and 78,542.66 is: 108,388.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,204.85 : 196,242.58 = 78,542.66 : x
  2. Step 2: Convert to fraction form
    142,204.85/196,242.58 = 78,542.66/x
  3. Step 3: Cross multiply
    142,204.85x = 196,242.58 × 78,542.66
  4. Step 4: Simplify right side
    142,204.85x = 15,413,414,827.25
  5. Step 5: Solve for x
    x = 15,413,414,827.25/142,204.85
  6. Step 6: Final answer
    x = 108,388.81

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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.