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Finding the Fourth Proportional to 74,189.88, 102,382.03 and 40,655.88

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Solution

The fourth proportional to 74,189.88, 102,382.03 and 40,655.88 is: 56,105.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,189.88 : 102,382.03 = 40,655.88 : x
  2. Step 2: Convert to fraction form
    74,189.88/102,382.03 = 40,655.88/x
  3. Step 3: Cross multiply
    74,189.88x = 102,382.03 × 40,655.88
  4. Step 4: Simplify right side
    74,189.88x = 4,162,431,525.84
  5. Step 5: Solve for x
    x = 4,162,431,525.84/74,189.88
  6. Step 6: Final answer
    x = 56,105.11

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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.