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Finding the Fourth Proportional to 42,321.60, 63,504 and 17,380.80

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Solution

The fourth proportional to 42,321.60, 63,504 and 17,380.80 is: 26,080.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,321.60 : 63,504 = 17,380.80 : x
  2. Step 2: Convert to fraction form
    42,321.60/63,504 = 17,380.80/x
  3. Step 3: Cross multiply
    42,321.60x = 63,504 × 17,380.80
  4. Step 4: Simplify right side
    42,321.60x = 1,103,750,323.20
  5. Step 5: Solve for x
    x = 1,103,750,323.20/42,321.60
  6. Step 6: Final answer
    x = 26,080.07

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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.