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Finding the Fourth Proportional to 74,141.40, 111,201.30 and 21,545.40

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Solution

The fourth proportional to 74,141.40, 111,201.30 and 21,545.40 is: 32,314.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,141.40 : 111,201.30 = 21,545.40 : x
  2. Step 2: Convert to fraction form
    74,141.40/111,201.30 = 21,545.40/x
  3. Step 3: Cross multiply
    74,141.40x = 111,201.30 × 21,545.40
  4. Step 4: Simplify right side
    74,141.40x = 2,395,876,489.02
  5. Step 5: Solve for x
    x = 2,395,876,489.02/74,141.40
  6. Step 6: Final answer
    x = 32,314.96

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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.