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Finding the Fourth Proportional to 68,115.60, 102,149.10 and 28,117.80

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Solution

The fourth proportional to 68,115.60, 102,149.10 and 28,117.80 is: 42,166.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,115.60 : 102,149.10 = 28,117.80 : x
  2. Step 2: Convert to fraction form
    68,115.60/102,149.10 = 28,117.80/x
  3. Step 3: Cross multiply
    68,115.60x = 102,149.10 × 28,117.80
  4. Step 4: Simplify right side
    68,115.60x = 2,872,207,963.98
  5. Step 5: Solve for x
    x = 2,872,207,963.98/68,115.60
  6. Step 6: Final answer
    x = 42,166.67

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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.