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Finding the Fourth Proportional to 66,471.52, 99,726.59 and 21,491.92

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Solution

The fourth proportional to 66,471.52, 99,726.59 and 21,491.92 is: 32,244.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,471.52 : 99,726.59 = 21,491.92 : x
  2. Step 2: Convert to fraction form
    66,471.52/99,726.59 = 21,491.92/x
  3. Step 3: Cross multiply
    66,471.52x = 99,726.59 × 21,491.92
  4. Step 4: Simplify right side
    66,471.52x = 2,143,315,894.15
  5. Step 5: Solve for x
    x = 2,143,315,894.15/66,471.52
  6. Step 6: Final answer
    x = 32,244.12

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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.