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Finding the Fourth Proportional to 101,979.80, 140,729.20 and 58,373.44

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Solution

The fourth proportional to 101,979.80, 140,729.20 and 58,373.44 is: 80,553.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,979.80 : 140,729.20 = 58,373.44 : x
  2. Step 2: Convert to fraction form
    101,979.80/140,729.20 = 58,373.44/x
  3. Step 3: Cross multiply
    101,979.80x = 140,729.20 × 58,373.44
  4. Step 4: Simplify right side
    101,979.80x = 8,214,847,512.45
  5. Step 5: Solve for x
    x = 8,214,847,512.45/101,979.80
  6. Step 6: Final answer
    x = 80,553.67

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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.