Home / 220,979.16-331,468.77-78,818.69

Finding the Fourth Proportional to 220,979.16, 331,468.77 and 78,818.69

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Solution

The fourth proportional to 220,979.16, 331,468.77 and 78,818.69 is: 118,228.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,979.16 : 331,468.77 = 78,818.69 : x
  2. Step 2: Convert to fraction form
    220,979.16/331,468.77 = 78,818.69/x
  3. Step 3: Cross multiply
    220,979.16x = 331,468.77 × 78,818.69
  4. Step 4: Simplify right side
    220,979.16x = 26,125,932,569.97
  5. Step 5: Solve for x
    x = 26,125,932,569.97/220,979.16
  6. Step 6: Final answer
    x = 118,228.04

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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.