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Finding the Fourth Proportional to 68,702.75, 94,809.80 and 38,894.75

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Solution

The fourth proportional to 68,702.75, 94,809.80 and 38,894.75 is: 53,674.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,702.75 : 94,809.80 = 38,894.75 : x
  2. Step 2: Convert to fraction form
    68,702.75/94,809.80 = 38,894.75/x
  3. Step 3: Cross multiply
    68,702.75x = 94,809.80 × 38,894.75
  4. Step 4: Simplify right side
    68,702.75x = 3,687,603,468.55
  5. Step 5: Solve for x
    x = 3,687,603,468.55/68,702.75
  6. Step 6: Final answer
    x = 53,674.76

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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.