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Finding the Fourth Proportional to 66,979.94, 92,441.94 and 40,123.58

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Solution

The fourth proportional to 66,979.94, 92,441.94 and 40,123.58 is: 55,376.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,979.94 : 92,441.94 = 40,123.58 : x
  2. Step 2: Convert to fraction form
    66,979.94/92,441.94 = 40,123.58/x
  3. Step 3: Cross multiply
    66,979.94x = 92,441.94 × 40,123.58
  4. Step 4: Simplify right side
    66,979.94x = 3,709,101,574.95
  5. Step 5: Solve for x
    x = 3,709,101,574.95/66,979.94
  6. Step 6: Final answer
    x = 55,376.30

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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.