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Finding the Fourth Proportional to 161,879.76, 223,396.86 and 89,291

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Solution

The fourth proportional to 161,879.76, 223,396.86 and 89,291 is: 123,223.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    161,879.76 : 223,396.86 = 89,291 : x
  2. Step 2: Convert to fraction form
    161,879.76/223,396.86 = 89,291/x
  3. Step 3: Cross multiply
    161,879.76x = 223,396.86 × 89,291
  4. Step 4: Simplify right side
    161,879.76x = 19,947,329,026.26
  5. Step 5: Solve for x
    x = 19,947,329,026.26/161,879.76
  6. Step 6: Final answer
    x = 123,223.12

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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.