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Finding the Fourth Proportional to 66,215.56, 99,302.28 and 21,834.04

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Solution

The fourth proportional to 66,215.56, 99,302.28 and 21,834.04 is: 32,744.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,215.56 : 99,302.28 = 21,834.04 : x
  2. Step 2: Convert to fraction form
    66,215.56/99,302.28 = 21,834.04/x
  3. Step 3: Cross multiply
    66,215.56x = 99,302.28 × 21,834.04
  4. Step 4: Simplify right side
    66,215.56x = 2,168,169,953.61
  5. Step 5: Solve for x
    x = 2,168,169,953.61/66,215.56
  6. Step 6: Final answer
    x = 32,744.12

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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.