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Finding the Fourth Proportional to 68,809.67, 94,957.31 and 40,123.79

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Solution

The fourth proportional to 68,809.67, 94,957.31 and 40,123.79 is: 55,370.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,809.67 : 94,957.31 = 40,123.79 : x
  2. Step 2: Convert to fraction form
    68,809.67/94,957.31 = 40,123.79/x
  3. Step 3: Cross multiply
    68,809.67x = 94,957.31 × 40,123.79
  4. Step 4: Simplify right side
    68,809.67x = 3,810,047,165.40
  5. Step 5: Solve for x
    x = 3,810,047,165.40/68,809.67
  6. Step 6: Final answer
    x = 55,370.81

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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.