Home / 261,208.11-391,839.00-90,429.58

Finding the Fourth Proportional to 261,208.11, 391,839.00 and 90,429.58

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Solution

The fourth proportional to 261,208.11, 391,839.00 and 90,429.58 is: 135,653.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,208.11 : 391,839.00 = 90,429.58 : x
  2. Step 2: Convert to fraction form
    261,208.11/391,839.00 = 90,429.58/x
  3. Step 3: Cross multiply
    261,208.11x = 391,839.00 × 90,429.58
  4. Step 4: Simplify right side
    261,208.11x = 35,433,833,786.28
  5. Step 5: Solve for x
    x = 35,433,833,786.28/261,208.11
  6. Step 6: Final answer
    x = 135,653.65

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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.