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Finding the Fourth Proportional to 131,507.70, 181,484.19 and 80,519.46

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Solution

The fourth proportional to 131,507.70, 181,484.19 and 80,519.46 is: 111,119.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,507.70 : 181,484.19 = 80,519.46 : x
  2. Step 2: Convert to fraction form
    131,507.70/181,484.19 = 80,519.46/x
  3. Step 3: Cross multiply
    131,507.70x = 181,484.19 × 80,519.46
  4. Step 4: Simplify right side
    131,507.70x = 14,613,008,977.34
  5. Step 5: Solve for x
    x = 14,613,008,977.34/131,507.70
  6. Step 6: Final answer
    x = 111,119.04

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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.