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Finding the Fourth Proportional to 66,266.10, 99,365.13 and 19,512.90

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Solution

The fourth proportional to 66,266.10, 99,365.13 and 19,512.90 is: 29,259.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,266.10 : 99,365.13 = 19,512.90 : x
  2. Step 2: Convert to fraction form
    66,266.10/99,365.13 = 19,512.90/x
  3. Step 3: Cross multiply
    66,266.10x = 99,365.13 × 19,512.90
  4. Step 4: Simplify right side
    66,266.10x = 1,938,901,845.18
  5. Step 5: Solve for x
    x = 1,938,901,845.18/66,266.10
  6. Step 6: Final answer
    x = 29,259.33

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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.