Home / 261,351.78-391,990.77-83,835.69

Finding the Fourth Proportional to 261,351.78, 391,990.77 and 83,835.69

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Solution

The fourth proportional to 261,351.78, 391,990.77 and 83,835.69 is: 125,741.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,351.78 : 391,990.77 = 83,835.69 : x
  2. Step 2: Convert to fraction form
    261,351.78/391,990.77 = 83,835.69/x
  3. Step 3: Cross multiply
    261,351.78x = 391,990.77 × 83,835.69
  4. Step 4: Simplify right side
    261,351.78x = 32,862,816,676.58
  5. Step 5: Solve for x
    x = 32,862,816,676.58/261,351.78
  6. Step 6: Final answer
    x = 125,741.70

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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.