Home / 278,780.47-418,186.53-79,085.18

Finding the Fourth Proportional to 278,780.47, 418,186.53 and 79,085.18

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Solution

The fourth proportional to 278,780.47, 418,186.53 and 79,085.18 is: 118,632.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,780.47 : 418,186.53 = 79,085.18 : x
  2. Step 2: Convert to fraction form
    278,780.47/418,186.53 = 79,085.18/x
  3. Step 3: Cross multiply
    278,780.47x = 418,186.53 × 79,085.18
  4. Step 4: Simplify right side
    278,780.47x = 33,072,358,044.09
  5. Step 5: Solve for x
    x = 33,072,358,044.09/278,780.47
  6. Step 6: Final answer
    x = 118,632.26

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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.