Home / 319,436,121.69-440,822,142.68-172,758,405.69

Finding the Fourth Proportional to 319,436,121.69, 440,822,142.68 and 172,758,405.69

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Solution

The fourth proportional to 319,436,121.69, 440,822,142.68 and 172,758,405.69 is: 238,406,759.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,436,121.69 : 440,822,142.68 = 172,758,405.69 : x
  2. Step 2: Convert to fraction form
    319,436,121.69/440,822,142.68 = 172,758,405.69/x
  3. Step 3: Cross multiply
    319,436,121.69x = 440,822,142.68 × 172,758,405.69
  4. Step 4: Simplify right side
    319,436,121.69x = 76,155,730,561,382,720
  5. Step 5: Solve for x
    x = 76,155,730,561,382,720/319,436,121.69
  6. Step 6: Final answer
    x = 238,406,759.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.