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Finding the Fourth Proportional to 74,230, 111,355.32 and 21,643.28

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Solution

The fourth proportional to 74,230, 111,355.32 and 21,643.28 is: 32,467.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,230 : 111,355.32 = 21,643.28 : x
  2. Step 2: Convert to fraction form
    74,230/111,355.32 = 21,643.28/x
  3. Step 3: Cross multiply
    74,230x = 111,355.32 × 21,643.28
  4. Step 4: Simplify right side
    74,230x = 2,410,094,370.25
  5. Step 5: Solve for x
    x = 2,410,094,370.25/74,230
  6. Step 6: Final answer
    x = 32,467.93

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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.