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Finding the Fourth Proportional to 66,410.16, 99,615 and 19,659.36

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Solution

The fourth proportional to 66,410.16, 99,615 and 19,659.36 is: 29,488.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,410.16 : 99,615 = 19,659.36 : x
  2. Step 2: Convert to fraction form
    66,410.16/99,615 = 19,659.36/x
  3. Step 3: Cross multiply
    66,410.16x = 99,615 × 19,659.36
  4. Step 4: Simplify right side
    66,410.16x = 1,958,367,146.40
  5. Step 5: Solve for x
    x = 1,958,367,146.40/66,410.16
  6. Step 6: Final answer
    x = 29,488.97

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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.