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Finding the Fourth Proportional to 74,688.44, 112,278.48 and 69,209.88

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Solution

The fourth proportional to 74,688.44, 112,278.48 and 69,209.88 is: 104,042.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,688.44 : 112,278.48 = 69,209.88 : x
  2. Step 2: Convert to fraction form
    74,688.44/112,278.48 = 69,209.88/x
  3. Step 3: Cross multiply
    74,688.44x = 112,278.48 × 69,209.88
  4. Step 4: Simplify right side
    74,688.44x = 7,770,780,127.38
  5. Step 5: Solve for x
    x = 7,770,780,127.38/74,688.44
  6. Step 6: Final answer
    x = 104,042.61

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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.