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Finding the Fourth Proportional to 159,890.72, 220,649.19 and 88,270.88

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Solution

The fourth proportional to 159,890.72, 220,649.19 and 88,270.88 is: 121,813.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,890.72 : 220,649.19 = 88,270.88 : x
  2. Step 2: Convert to fraction form
    159,890.72/220,649.19 = 88,270.88/x
  3. Step 3: Cross multiply
    159,890.72x = 220,649.19 × 88,270.88
  4. Step 4: Simplify right side
    159,890.72x = 19,476,898,172.59
  5. Step 5: Solve for x
    x = 19,476,898,172.59/159,890.72
  6. Step 6: Final answer
    x = 121,813.81

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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.