Home / 260,678.07-391,059.29-80,721.20

Finding the Fourth Proportional to 260,678.07, 391,059.29 and 80,721.20

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Solution

The fourth proportional to 260,678.07, 391,059.29 and 80,721.20 is: 121,094.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,678.07 : 391,059.29 = 80,721.20 : x
  2. Step 2: Convert to fraction form
    260,678.07/391,059.29 = 80,721.20/x
  3. Step 3: Cross multiply
    260,678.07x = 391,059.29 × 80,721.20
  4. Step 4: Simplify right side
    260,678.07x = 31,566,772,801.05
  5. Step 5: Solve for x
    x = 31,566,772,801.05/260,678.07
  6. Step 6: Final answer
    x = 121,094.85

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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.