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Finding the Fourth Proportional to 66,261.60, 99,363.60 and 19,504.80

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Solution

The fourth proportional to 66,261.60, 99,363.60 and 19,504.80 is: 29,248.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,261.60 : 99,363.60 = 19,504.80 : x
  2. Step 2: Convert to fraction form
    66,261.60/99,363.60 = 19,504.80/x
  3. Step 3: Cross multiply
    66,261.60x = 99,363.60 × 19,504.80
  4. Step 4: Simplify right side
    66,261.60x = 1,938,067,145.28
  5. Step 5: Solve for x
    x = 1,938,067,145.28/66,261.60
  6. Step 6: Final answer
    x = 29,248.72

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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.