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Finding the Fourth Proportional to 40,179, 60,268.50 and 15,555

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Solution

The fourth proportional to 40,179, 60,268.50 and 15,555 is: 23,332.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,179 : 60,268.50 = 15,555 : x
  2. Step 2: Convert to fraction form
    40,179/60,268.50 = 15,555/x
  3. Step 3: Cross multiply
    40,179x = 60,268.50 × 15,555
  4. Step 4: Simplify right side
    40,179x = 937,476,517.50
  5. Step 5: Solve for x
    x = 937,476,517.50/40,179
  6. Step 6: Final answer
    x = 23,332.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.