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Finding the Fourth Proportional to 68,745.80, 94,875.30 and 40,063.88

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Solution

The fourth proportional to 68,745.80, 94,875.30 and 40,063.88 is: 55,291.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,745.80 : 94,875.30 = 40,063.88 : x
  2. Step 2: Convert to fraction form
    68,745.80/94,875.30 = 40,063.88/x
  3. Step 3: Cross multiply
    68,745.80x = 94,875.30 × 40,063.88
  4. Step 4: Simplify right side
    68,745.80x = 3,801,072,159.79
  5. Step 5: Solve for x
    x = 3,801,072,159.79/68,745.80
  6. Step 6: Final answer
    x = 55,291.70

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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.