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Finding the Fourth Proportional to 74,474.88, 102,879.77 and 67,748.64

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Solution

The fourth proportional to 74,474.88, 102,879.77 and 67,748.64 is: 93,588.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,474.88 : 102,879.77 = 67,748.64 : x
  2. Step 2: Convert to fraction form
    74,474.88/102,879.77 = 67,748.64/x
  3. Step 3: Cross multiply
    74,474.88x = 102,879.77 × 67,748.64
  4. Step 4: Simplify right side
    74,474.88x = 6,969,964,162.27
  5. Step 5: Solve for x
    x = 6,969,964,162.27/74,474.88
  6. Step 6: Final answer
    x = 93,588.12

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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.