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Finding the Fourth Proportional to 159,538.70, 220,163.40 and 87,918.72

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Solution

The fourth proportional to 159,538.70, 220,163.40 and 87,918.72 is: 121,327.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,538.70 : 220,163.40 = 87,918.72 : x
  2. Step 2: Convert to fraction form
    159,538.70/220,163.40 = 87,918.72/x
  3. Step 3: Cross multiply
    159,538.70x = 220,163.40 × 87,918.72
  4. Step 4: Simplify right side
    159,538.70x = 19,356,483,493.24
  5. Step 5: Solve for x
    x = 19,356,483,493.24/159,538.70
  6. Step 6: Final answer
    x = 121,327.83

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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.