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Finding the Fourth Proportional to 74,169.40, 111,204.96 and 40,905.40

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Solution

The fourth proportional to 74,169.40, 111,204.96 and 40,905.40 is: 61,331.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,169.40 : 111,204.96 = 40,905.40 : x
  2. Step 2: Convert to fraction form
    74,169.40/111,204.96 = 40,905.40/x
  3. Step 3: Cross multiply
    74,169.40x = 111,204.96 × 40,905.40
  4. Step 4: Simplify right side
    74,169.40x = 4,548,883,370.78
  5. Step 5: Solve for x
    x = 4,548,883,370.78/74,169.40
  6. Step 6: Final answer
    x = 61,331.00

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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.