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Finding the Fourth Proportional to 74,394.12, 102,665.46 and 40,859.88

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Solution

The fourth proportional to 74,394.12, 102,665.46 and 40,859.88 is: 56,387.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,394.12 : 102,665.46 = 40,859.88 : x
  2. Step 2: Convert to fraction form
    74,394.12/102,665.46 = 40,859.88/x
  3. Step 3: Cross multiply
    74,394.12x = 102,665.46 × 40,859.88
  4. Step 4: Simplify right side
    74,394.12x = 4,194,898,375.74
  5. Step 5: Solve for x
    x = 4,194,898,375.74/74,394.12
  6. Step 6: Final answer
    x = 56,387.50

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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.