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Finding the Fourth Proportional to 159,653.76, 220,354.12 and 91,717.33

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Solution

The fourth proportional to 159,653.76, 220,354.12 and 91,717.33 is: 126,588.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,653.76 : 220,354.12 = 91,717.33 : x
  2. Step 2: Convert to fraction form
    159,653.76/220,354.12 = 91,717.33/x
  3. Step 3: Cross multiply
    159,653.76x = 220,354.12 × 91,717.33
  4. Step 4: Simplify right side
    159,653.76x = 20,210,291,540.90
  5. Step 5: Solve for x
    x = 20,210,291,540.90/159,653.76
  6. Step 6: Final answer
    x = 126,588.26

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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.