Home / 142,659.46-196,870.05-78,997.30

Finding the Fourth Proportional to 142,659.46, 196,870.05 and 78,997.30

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Solution

The fourth proportional to 142,659.46, 196,870.05 and 78,997.30 is: 109,016.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,659.46 : 196,870.05 = 78,997.30 : x
  2. Step 2: Convert to fraction form
    142,659.46/196,870.05 = 78,997.30/x
  3. Step 3: Cross multiply
    142,659.46x = 196,870.05 × 78,997.30
  4. Step 4: Simplify right side
    142,659.46x = 15,552,202,400.87
  5. Step 5: Solve for x
    x = 15,552,202,400.87/142,659.46
  6. Step 6: Final answer
    x = 109,016.27

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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.