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Finding the Fourth Proportional to 110,640.96, 165,960.72 and 66,280.32

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Solution

The fourth proportional to 110,640.96, 165,960.72 and 66,280.32 is: 99,420.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,640.96 : 165,960.72 = 66,280.32 : x
  2. Step 2: Convert to fraction form
    110,640.96/165,960.72 = 66,280.32/x
  3. Step 3: Cross multiply
    110,640.96x = 165,960.72 × 66,280.32
  4. Step 4: Simplify right side
    110,640.96x = 10,999,929,629.03
  5. Step 5: Solve for x
    x = 10,999,929,629.03/110,640.96
  6. Step 6: Final answer
    x = 99,420.05

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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.