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Finding the Fourth Proportional to 279,044,392.80, 418,566,589.20 and 84,954,266.40

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Solution

The fourth proportional to 279,044,392.80, 418,566,589.20 and 84,954,266.40 is: 127,431,399.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,044,392.80 : 418,566,589.20 = 84,954,266.40 : x
  2. Step 2: Convert to fraction form
    279,044,392.80/418,566,589.20 = 84,954,266.40/x
  3. Step 3: Cross multiply
    279,044,392.80x = 418,566,589.20 × 84,954,266.40
  4. Step 4: Simplify right side
    279,044,392.80x = 35,559,017,525,036,164
  5. Step 5: Solve for x
    x = 35,559,017,525,036,164/279,044,392.80
  6. Step 6: Final answer
    x = 127,431,399.60

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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.