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Finding the Fourth Proportional to 74,269.78, 111,411.25 and 20,962.13

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Solution

The fourth proportional to 74,269.78, 111,411.25 and 20,962.13 is: 31,445.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,269.78 : 111,411.25 = 20,962.13 : x
  2. Step 2: Convert to fraction form
    74,269.78/111,411.25 = 20,962.13/x
  3. Step 3: Cross multiply
    74,269.78x = 111,411.25 × 20,962.13
  4. Step 4: Simplify right side
    74,269.78x = 2,335,416,496.50
  5. Step 5: Solve for x
    x = 2,335,416,496.50/74,269.78
  6. Step 6: Final answer
    x = 31,445.05

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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.