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Finding the Fourth Proportional to 66,480.87, 99,720.54 and 19,097.12

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Solution

The fourth proportional to 66,480.87, 99,720.54 and 19,097.12 is: 28,645.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,480.87 : 99,720.54 = 19,097.12 : x
  2. Step 2: Convert to fraction form
    66,480.87/99,720.54 = 19,097.12/x
  3. Step 3: Cross multiply
    66,480.87x = 99,720.54 × 19,097.12
  4. Step 4: Simplify right side
    66,480.87x = 1,904,375,371.12
  5. Step 5: Solve for x
    x = 1,904,375,371.12/66,480.87
  6. Step 6: Final answer
    x = 28,645.46

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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.