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Finding the Fourth Proportional to 159,434.53, 220,029.63 and 87,814.54

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Solution

The fourth proportional to 159,434.53, 220,029.63 and 87,814.54 is: 121,189.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,434.53 : 220,029.63 = 87,814.54 : x
  2. Step 2: Convert to fraction form
    159,434.53/220,029.63 = 87,814.54/x
  3. Step 3: Cross multiply
    159,434.53x = 220,029.63 × 87,814.54
  4. Step 4: Simplify right side
    159,434.53x = 19,321,800,744.82
  5. Step 5: Solve for x
    x = 19,321,800,744.82/159,434.53
  6. Step 6: Final answer
    x = 121,189.56

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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.