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Finding the Fourth Proportional to 54,381.60, 81,602.12 and 21,102.97

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Solution

The fourth proportional to 54,381.60, 81,602.12 and 21,102.97 is: 31,665.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,381.60 : 81,602.12 = 21,102.97 : x
  2. Step 2: Convert to fraction form
    54,381.60/81,602.12 = 21,102.97/x
  3. Step 3: Cross multiply
    54,381.60x = 81,602.12 × 21,102.97
  4. Step 4: Simplify right side
    54,381.60x = 1,722,047,090.30
  5. Step 5: Solve for x
    x = 1,722,047,090.30/54,381.60
  6. Step 6: Final answer
    x = 31,665.99

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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.