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Finding the Fourth Proportional to 25,856,698.80, 38,785,048.20 and 25,478,785.20

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Solution

The fourth proportional to 25,856,698.80, 38,785,048.20 and 25,478,785.20 is: 38,218,177.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,856,698.80 : 38,785,048.20 = 25,478,785.20 : x
  2. Step 2: Convert to fraction form
    25,856,698.80/38,785,048.20 = 25,478,785.20/x
  3. Step 3: Cross multiply
    25,856,698.80x = 38,785,048.20 × 25,478,785.20
  4. Step 4: Simplify right side
    25,856,698.80x = 988,195,912,059,446.62
  5. Step 5: Solve for x
    x = 988,195,912,059,446.62/25,856,698.80
  6. Step 6: Final answer
    x = 38,218,177.80

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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.