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Finding the Fourth Proportional to 159,433.72, 220,028.50 and 87,813.72

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Solution

The fourth proportional to 159,433.72, 220,028.50 and 87,813.72 is: 121,188.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,433.72 : 220,028.50 = 87,813.72 : x
  2. Step 2: Convert to fraction form
    159,433.72/220,028.50 = 87,813.72/x
  3. Step 3: Cross multiply
    159,433.72x = 220,028.50 × 87,813.72
  4. Step 4: Simplify right side
    159,433.72x = 19,321,521,200.79
  5. Step 5: Solve for x
    x = 19,321,521,200.79/159,433.72
  6. Step 6: Final answer
    x = 121,188.43

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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.