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Finding the Fourth Proportional to 50,949,424.80, 76,428,802.80 and 20,651,018.40

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Solution

The fourth proportional to 50,949,424.80, 76,428,802.80 and 20,651,018.40 is: 30,978,418.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,949,424.80 : 76,428,802.80 = 20,651,018.40 : x
  2. Step 2: Convert to fraction form
    50,949,424.80/76,428,802.80 = 20,651,018.40/x
  3. Step 3: Cross multiply
    50,949,424.80x = 76,428,802.80 × 20,651,018.40
  4. Step 4: Simplify right side
    50,949,424.80x = 1,578,332,612,912,771.25
  5. Step 5: Solve for x
    x = 1,578,332,612,912,771.25/50,949,424.80
  6. Step 6: Final answer
    x = 30,978,418.68

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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.