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Finding the Fourth Proportional to 74,219.40, 111,318.30 and 21,623.40

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Solution

The fourth proportional to 74,219.40, 111,318.30 and 21,623.40 is: 32,431.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,219.40 : 111,318.30 = 21,623.40 : x
  2. Step 2: Convert to fraction form
    74,219.40/111,318.30 = 21,623.40/x
  3. Step 3: Cross multiply
    74,219.40x = 111,318.30 × 21,623.40
  4. Step 4: Simplify right side
    74,219.40x = 2,407,080,128.22
  5. Step 5: Solve for x
    x = 2,407,080,128.22/74,219.40
  6. Step 6: Final answer
    x = 32,431.95

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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.