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Finding the Fourth Proportional to 68,065.66, 93,916.85 and 39,765.88

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Solution

The fourth proportional to 68,065.66, 93,916.85 and 39,765.88 is: 54,868.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,065.66 : 93,916.85 = 39,765.88 : x
  2. Step 2: Convert to fraction form
    68,065.66/93,916.85 = 39,765.88/x
  3. Step 3: Cross multiply
    68,065.66x = 93,916.85 × 39,765.88
  4. Step 4: Simplify right side
    68,065.66x = 3,734,686,361.45
  5. Step 5: Solve for x
    x = 3,734,686,361.45/68,065.66
  6. Step 6: Final answer
    x = 54,868.88

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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.