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Finding the Fourth Proportional to 66,100.65, 99,140.70 and 21,727.10

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Solution

The fourth proportional to 66,100.65, 99,140.70 and 21,727.10 is: 32,587.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,100.65 : 99,140.70 = 21,727.10 : x
  2. Step 2: Convert to fraction form
    66,100.65/99,140.70 = 21,727.10/x
  3. Step 3: Cross multiply
    66,100.65x = 99,140.70 × 21,727.10
  4. Step 4: Simplify right side
    66,100.65x = 2,154,040,232.30
  5. Step 5: Solve for x
    x = 2,154,040,232.30/66,100.65
  6. Step 6: Final answer
    x = 32,587.28

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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.