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Finding the Fourth Proportional to 159,918.72, 220,668.48 and 88,293.12

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Solution

The fourth proportional to 159,918.72, 220,668.48 and 88,293.12 is: 121,833.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,918.72 : 220,668.48 = 88,293.12 : x
  2. Step 2: Convert to fraction form
    159,918.72/220,668.48 = 88,293.12/x
  3. Step 3: Cross multiply
    159,918.72x = 220,668.48 × 88,293.12
  4. Step 4: Simplify right side
    159,918.72x = 19,483,508,584.86
  5. Step 5: Solve for x
    x = 19,483,508,584.86/159,918.72
  6. Step 6: Final answer
    x = 121,833.82

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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.