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Finding the Fourth Proportional to 139,968,233.40, 209,952,350.10 and 128,882,767.80

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Solution

The fourth proportional to 139,968,233.40, 209,952,350.10 and 128,882,767.80 is: 193,324,151.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,968,233.40 : 209,952,350.10 = 128,882,767.80 : x
  2. Step 2: Convert to fraction form
    139,968,233.40/209,952,350.10 = 128,882,767.80/x
  3. Step 3: Cross multiply
    139,968,233.40x = 209,952,350.10 × 128,882,767.80
  4. Step 4: Simplify right side
    139,968,233.40x = 27,059,239,987,002,604
  5. Step 5: Solve for x
    x = 27,059,239,987,002,604/139,968,233.40
  6. Step 6: Final answer
    x = 193,324,151.70

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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.