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Finding the Fourth Proportional to 101,991.32, 153,003.36 and 42,843.90

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Solution

The fourth proportional to 101,991.32, 153,003.36 and 42,843.90 is: 64,272.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,991.32 : 153,003.36 = 42,843.90 : x
  2. Step 2: Convert to fraction form
    101,991.32/153,003.36 = 42,843.90/x
  3. Step 3: Cross multiply
    101,991.32x = 153,003.36 × 42,843.90
  4. Step 4: Simplify right side
    101,991.32x = 6,555,260,655.50
  5. Step 5: Solve for x
    x = 6,555,260,655.50/101,991.32
  6. Step 6: Final answer
    x = 64,272.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.