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Finding the Fourth Proportional to 68,606,900.40, 102,815,872.20 and 45,512,180.40

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Solution

The fourth proportional to 68,606,900.40, 102,815,872.20 and 45,512,180.40 is: 68,205,595.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,606,900.40 : 102,815,872.20 = 45,512,180.40 : x
  2. Step 2: Convert to fraction form
    68,606,900.40/102,815,872.20 = 45,512,180.40/x
  3. Step 3: Cross multiply
    68,606,900.40x = 102,815,872.20 × 45,512,180.40
  4. Step 4: Simplify right side
    68,606,900.40x = 4,679,374,523,549,745
  5. Step 5: Solve for x
    x = 4,679,374,523,549,745/68,606,900.40
  6. Step 6: Final answer
    x = 68,205,595.88

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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.