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Finding the Fourth Proportional to 101,122.21, 140,138.65 and 99,695.20

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Solution

The fourth proportional to 101,122.21, 140,138.65 and 99,695.20 is: 138,161.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,122.21 : 140,138.65 = 99,695.20 : x
  2. Step 2: Convert to fraction form
    101,122.21/140,138.65 = 99,695.20/x
  3. Step 3: Cross multiply
    101,122.21x = 140,138.65 × 99,695.20
  4. Step 4: Simplify right side
    101,122.21x = 13,971,150,739.48
  5. Step 5: Solve for x
    x = 13,971,150,739.48/101,122.21
  6. Step 6: Final answer
    x = 138,161.05

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.