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Finding the Fourth Proportional to 66,291.98, 99,453.51 and 21,918.71

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Solution

The fourth proportional to 66,291.98, 99,453.51 and 21,918.71 is: 32,883.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,291.98 : 99,453.51 = 21,918.71 : x
  2. Step 2: Convert to fraction form
    66,291.98/99,453.51 = 21,918.71/x
  3. Step 3: Cross multiply
    66,291.98x = 99,453.51 × 21,918.71
  4. Step 4: Simplify right side
    66,291.98x = 2,179,892,892.81
  5. Step 5: Solve for x
    x = 2,179,892,892.81/66,291.98
  6. Step 6: Final answer
    x = 32,883.21

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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.