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Finding the Fourth Proportional to 68,074.49, 93,928.92 and 39,774.71

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Solution

The fourth proportional to 68,074.49, 93,928.92 and 39,774.71 is: 54,880.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,074.49 : 93,928.92 = 39,774.71 : x
  2. Step 2: Convert to fraction form
    68,074.49/93,928.92 = 39,774.71/x
  3. Step 3: Cross multiply
    68,074.49x = 93,928.92 × 39,774.71
  4. Step 4: Simplify right side
    68,074.49x = 3,735,995,553.61
  5. Step 5: Solve for x
    x = 3,735,995,553.61/68,074.49
  6. Step 6: Final answer
    x = 54,880.99

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1.5x scale

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.