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Finding the Fourth Proportional to 74,019.70, 111,029.55 and 67,021.30

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Solution

The fourth proportional to 74,019.70, 111,029.55 and 67,021.30 is: 100,531.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,019.70 : 111,029.55 = 67,021.30 : x
  2. Step 2: Convert to fraction form
    74,019.70/111,029.55 = 67,021.30/x
  3. Step 3: Cross multiply
    74,019.70x = 111,029.55 × 67,021.30
  4. Step 4: Simplify right side
    74,019.70x = 7,441,344,779.42
  5. Step 5: Solve for x
    x = 7,441,344,779.42/74,019.70
  6. Step 6: Final answer
    x = 100,531.95

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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.