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Finding the Fourth Proportional to 74,231.40, 111,347.10 and 18,827.40

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Solution

The fourth proportional to 74,231.40, 111,347.10 and 18,827.40 is: 28,241.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,231.40 : 111,347.10 = 18,827.40 : x
  2. Step 2: Convert to fraction form
    74,231.40/111,347.10 = 18,827.40/x
  3. Step 3: Cross multiply
    74,231.40x = 111,347.10 × 18,827.40
  4. Step 4: Simplify right side
    74,231.40x = 2,096,376,390.54
  5. Step 5: Solve for x
    x = 2,096,376,390.54/74,231.40
  6. Step 6: Final answer
    x = 28,241.10

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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.