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Finding the Fourth Proportional to 68,064.80, 93,915.65 and 39,765.02

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Solution

The fourth proportional to 68,064.80, 93,915.65 and 39,765.02 is: 54,867.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,064.80 : 93,915.65 = 39,765.02 : x
  2. Step 2: Convert to fraction form
    68,064.80/93,915.65 = 39,765.02/x
  3. Step 3: Cross multiply
    68,064.80x = 93,915.65 × 39,765.02
  4. Step 4: Simplify right side
    68,064.80x = 3,734,557,330.40
  5. Step 5: Solve for x
    x = 3,734,557,330.40/68,064.80
  6. Step 6: Final answer
    x = 54,867.68

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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.