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Finding the Fourth Proportional to 117,169.80, 161,697.28 and 71,872.76

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Solution

The fourth proportional to 117,169.80, 161,697.28 and 71,872.76 is: 99,186.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,169.80 : 161,697.28 = 71,872.76 : x
  2. Step 2: Convert to fraction form
    117,169.80/161,697.28 = 71,872.76/x
  3. Step 3: Cross multiply
    117,169.80x = 161,697.28 × 71,872.76
  4. Step 4: Simplify right side
    117,169.80x = 11,621,630,005.86
  5. Step 5: Solve for x
    x = 11,621,630,005.86/117,169.80
  6. Step 6: Final answer
    x = 99,186.22

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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.