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Finding the Fourth Proportional to 74,504.76, 111,772.80 and 21,909.84

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Solution

The fourth proportional to 74,504.76, 111,772.80 and 21,909.84 is: 32,869.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,504.76 : 111,772.80 = 21,909.84 : x
  2. Step 2: Convert to fraction form
    74,504.76/111,772.80 = 21,909.84/x
  3. Step 3: Cross multiply
    74,504.76x = 111,772.80 × 21,909.84
  4. Step 4: Simplify right side
    74,504.76x = 2,448,924,164.35
  5. Step 5: Solve for x
    x = 2,448,924,164.35/74,504.76
  6. Step 6: Final answer
    x = 32,869.37

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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.