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Finding the Fourth Proportional to 54,763.47, 82,145.21 and 21,499.20

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Solution

The fourth proportional to 54,763.47, 82,145.21 and 21,499.20 is: 32,248.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,763.47 : 82,145.21 = 21,499.20 : x
  2. Step 2: Convert to fraction form
    54,763.47/82,145.21 = 21,499.20/x
  3. Step 3: Cross multiply
    54,763.47x = 82,145.21 × 21,499.20
  4. Step 4: Simplify right side
    54,763.47x = 1,766,056,191.34
  5. Step 5: Solve for x
    x = 1,766,056,191.34/54,763.47
  6. Step 6: Final answer
    x = 32,248.80

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1.5x scale

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.