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Finding the Fourth Proportional to 74,228, 111,352.32 and 21,641.28

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Solution

The fourth proportional to 74,228, 111,352.32 and 21,641.28 is: 32,464.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,228 : 111,352.32 = 21,641.28 : x
  2. Step 2: Convert to fraction form
    74,228/111,352.32 = 21,641.28/x
  3. Step 3: Cross multiply
    74,228x = 111,352.32 × 21,641.28
  4. Step 4: Simplify right side
    74,228x = 2,409,806,735.77
  5. Step 5: Solve for x
    x = 2,409,806,735.77/74,228
  6. Step 6: Final answer
    x = 32,464.93

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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.