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Finding the Fourth Proportional to 69,917.32, 104,820.54 and 36,631

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Solution

The fourth proportional to 69,917.32, 104,820.54 and 36,631 is: 54,917.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,917.32 : 104,820.54 = 36,631 : x
  2. Step 2: Convert to fraction form
    69,917.32/104,820.54 = 36,631/x
  3. Step 3: Cross multiply
    69,917.32x = 104,820.54 × 36,631
  4. Step 4: Simplify right side
    69,917.32x = 3,839,681,200.74
  5. Step 5: Solve for x
    x = 3,839,681,200.74/69,917.32
  6. Step 6: Final answer
    x = 54,917.45

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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.