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Finding the Fourth Proportional to 40,090.25, 60,117.60 and 21,366.80

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Solution

The fourth proportional to 40,090.25, 60,117.60 and 21,366.80 is: 32,040.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,090.25 : 60,117.60 = 21,366.80 : x
  2. Step 2: Convert to fraction form
    40,090.25/60,117.60 = 21,366.80/x
  3. Step 3: Cross multiply
    40,090.25x = 60,117.60 × 21,366.80
  4. Step 4: Simplify right side
    40,090.25x = 1,284,520,435.09
  5. Step 5: Solve for x
    x = 1,284,520,435.09/40,090.25
  6. Step 6: Final answer
    x = 32,040.72

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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.