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Finding the Fourth Proportional to 74,308.68, 111,469.50 and 21,001.22

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Solution

The fourth proportional to 74,308.68, 111,469.50 and 21,001.22 is: 31,503.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,308.68 : 111,469.50 = 21,001.22 : x
  2. Step 2: Convert to fraction form
    74,308.68/111,469.50 = 21,001.22/x
  3. Step 3: Cross multiply
    74,308.68x = 111,469.50 × 21,001.22
  4. Step 4: Simplify right side
    74,308.68x = 2,340,995,492.79
  5. Step 5: Solve for x
    x = 2,340,995,492.79/74,308.68
  6. Step 6: Final answer
    x = 31,503.66

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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.