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Finding the Fourth Proportional to 159,387.33, 219,978.44 and 121,083.84

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Solution

The fourth proportional to 159,387.33, 219,978.44 and 121,083.84 is: 167,113.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,387.33 : 219,978.44 = 121,083.84 : x
  2. Step 2: Convert to fraction form
    159,387.33/219,978.44 = 121,083.84/x
  3. Step 3: Cross multiply
    159,387.33x = 219,978.44 × 121,083.84
  4. Step 4: Simplify right side
    159,387.33x = 26,635,833,626.99
  5. Step 5: Solve for x
    x = 26,635,833,626.99/159,387.33
  6. Step 6: Final answer
    x = 167,113.87

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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.