Home / 142,553.21-196,729.60-78,891.02

Finding the Fourth Proportional to 142,553.21, 196,729.60 and 78,891.02

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Solution

The fourth proportional to 142,553.21, 196,729.60 and 78,891.02 is: 108,873.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,553.21 : 196,729.60 = 78,891.02 : x
  2. Step 2: Convert to fraction form
    142,553.21/196,729.60 = 78,891.02/x
  3. Step 3: Cross multiply
    142,553.21x = 196,729.60 × 78,891.02
  4. Step 4: Simplify right side
    142,553.21x = 15,520,198,808.19
  5. Step 5: Solve for x
    x = 15,520,198,808.19/142,553.21
  6. Step 6: Final answer
    x = 108,873.02

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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.