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Finding the Fourth Proportional to 72,405,132.80, 108,578,830.80 and 23,869,479.20

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Solution

The fourth proportional to 72,405,132.80, 108,578,830.80 and 23,869,479.20 is: 35,794,701.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,405,132.80 : 108,578,830.80 = 23,869,479.20 : x
  2. Step 2: Convert to fraction form
    72,405,132.80/108,578,830.80 = 23,869,479.20/x
  3. Step 3: Cross multiply
    72,405,132.80x = 108,578,830.80 × 23,869,479.20
  4. Step 4: Simplify right side
    72,405,132.80x = 2,591,720,143,340,919
  5. Step 5: Solve for x
    x = 2,591,720,143,340,919/72,405,132.80
  6. Step 6: Final answer
    x = 35,794,701.88

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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.