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Finding the Fourth Proportional to 251,906,482.78, 378,029,977.28 and 88,145,658.03

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Solution

The fourth proportional to 251,906,482.78, 378,029,977.28 and 88,145,658.03 is: 132,278,061.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,906,482.78 : 378,029,977.28 = 88,145,658.03 : x
  2. Step 2: Convert to fraction form
    251,906,482.78/378,029,977.28 = 88,145,658.03/x
  3. Step 3: Cross multiply
    251,906,482.78x = 378,029,977.28 × 88,145,658.03
  4. Step 4: Simplify right side
    251,906,482.78x = 33,321,701,100,217,248
  5. Step 5: Solve for x
    x = 33,321,701,100,217,248/251,906,482.78
  6. Step 6: Final answer
    x = 132,278,061.02

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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.