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Finding the Fourth Proportional to 23,381,738.40, 34,978,129.20 and 20,221,960.80

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Solution

The fourth proportional to 23,381,738.40, 34,978,129.20 and 20,221,960.80 is: 30,251,230.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,381,738.40 : 34,978,129.20 = 20,221,960.80 : x
  2. Step 2: Convert to fraction form
    23,381,738.40/34,978,129.20 = 20,221,960.80/x
  3. Step 3: Cross multiply
    23,381,738.40x = 34,978,129.20 × 20,221,960.80
  4. Step 4: Simplify right side
    23,381,738.40x = 707,326,357,539,735.50
  5. Step 5: Solve for x
    x = 707,326,357,539,735.50/23,381,738.40
  6. Step 6: Final answer
    x = 30,251,230.49

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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.