Home / 142,221.16-196,261.86-78,553.96

Finding the Fourth Proportional to 142,221.16, 196,261.86 and 78,553.96

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Solution

The fourth proportional to 142,221.16, 196,261.86 and 78,553.96 is: 108,402.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,221.16 : 196,261.86 = 78,553.96 : x
  2. Step 2: Convert to fraction form
    142,221.16/196,261.86 = 78,553.96/x
  3. Step 3: Cross multiply
    142,221.16x = 196,261.86 × 78,553.96
  4. Step 4: Simplify right side
    142,221.16x = 15,417,146,299.97
  5. Step 5: Solve for x
    x = 15,417,146,299.97/142,221.16
  6. Step 6: Final answer
    x = 108,402.62

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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.