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Finding the Fourth Proportional to 68,880.78, 95,031.03 and 45,021.21

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Solution

The fourth proportional to 68,880.78, 95,031.03 and 45,021.21 is: 62,113.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,880.78 : 95,031.03 = 45,021.21 : x
  2. Step 2: Convert to fraction form
    68,880.78/95,031.03 = 45,021.21/x
  3. Step 3: Cross multiply
    68,880.78x = 95,031.03 × 45,021.21
  4. Step 4: Simplify right side
    68,880.78x = 4,278,411,958.15
  5. Step 5: Solve for x
    x = 4,278,411,958.15/68,880.78
  6. Step 6: Final answer
    x = 62,113.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.