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Finding the Fourth Proportional to 120,879.71, 181,347.92 and 118,871.42

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Solution

The fourth proportional to 120,879.71, 181,347.92 and 118,871.42 is: 178,335.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,879.71 : 181,347.92 = 118,871.42 : x
  2. Step 2: Convert to fraction form
    120,879.71/181,347.92 = 118,871.42/x
  3. Step 3: Cross multiply
    120,879.71x = 181,347.92 × 118,871.42
  4. Step 4: Simplify right side
    120,879.71x = 21,557,084,920.64
  5. Step 5: Solve for x
    x = 21,557,084,920.64/120,879.71
  6. Step 6: Final answer
    x = 178,335.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.