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Finding the Fourth Proportional to 66,383, 99,584.33 and 21,389.28

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Solution

The fourth proportional to 66,383, 99,584.33 and 21,389.28 is: 32,087.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,383 : 99,584.33 = 21,389.28 : x
  2. Step 2: Convert to fraction form
    66,383/99,584.33 = 21,389.28/x
  3. Step 3: Cross multiply
    66,383x = 99,584.33 × 21,389.28
  4. Step 4: Simplify right side
    66,383x = 2,130,037,117.98
  5. Step 5: Solve for x
    x = 2,130,037,117.98/66,383
  6. Step 6: Final answer
    x = 32,087.09

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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.