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Finding the Fourth Proportional to 66,047.70, 99,068.07 and 21,668.61

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Solution

The fourth proportional to 66,047.70, 99,068.07 and 21,668.61 is: 32,501.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,047.70 : 99,068.07 = 21,668.61 : x
  2. Step 2: Convert to fraction form
    66,047.70/99,068.07 = 21,668.61/x
  3. Step 3: Cross multiply
    66,047.70x = 99,068.07 × 21,668.61
  4. Step 4: Simplify right side
    66,047.70x = 2,146,667,372.28
  5. Step 5: Solve for x
    x = 2,146,667,372.28/66,047.70
  6. Step 6: Final answer
    x = 32,501.77

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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.