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Finding the Fourth Proportional to 54,070.21, 81,067.11 and 20,762.20

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Solution

The fourth proportional to 54,070.21, 81,067.11 and 20,762.20 is: 31,128.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,070.21 : 81,067.11 = 20,762.20 : x
  2. Step 2: Convert to fraction form
    54,070.21/81,067.11 = 20,762.20/x
  3. Step 3: Cross multiply
    54,070.21x = 81,067.11 × 20,762.20
  4. Step 4: Simplify right side
    54,070.21x = 1,683,131,551.24
  5. Step 5: Solve for x
    x = 1,683,131,551.24/54,070.21
  6. Step 6: Final answer
    x = 31,128.63

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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.