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Finding the Fourth Proportional to 66,381.00, 99,581.33 and 21,387.28

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Solution

The fourth proportional to 66,381.00, 99,581.33 and 21,387.28 is: 32,084.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,381.00 : 99,581.33 = 21,387.28 : x
  2. Step 2: Convert to fraction form
    66,381.00/99,581.33 = 21,387.28/x
  3. Step 3: Cross multiply
    66,381.00x = 99,581.33 × 21,387.28
  4. Step 4: Simplify right side
    66,381.00x = 2,129,773,717.27
  5. Step 5: Solve for x
    x = 2,129,773,717.27/66,381.00
  6. Step 6: Final answer
    x = 32,084.08

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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.