Home / 66,515.20-99,789.20-19,768.07

Finding the Fourth Proportional to 66,515.20, 99,789.20 and 19,768.07

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Solution

The fourth proportional to 66,515.20, 99,789.20 and 19,768.07 is: 29,656.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,515.20 : 99,789.20 = 19,768.07 : x
  2. Step 2: Convert to fraction form
    66,515.20/99,789.20 = 19,768.07/x
  3. Step 3: Cross multiply
    66,515.20x = 99,789.20 × 19,768.07
  4. Step 4: Simplify right side
    66,515.20x = 1,972,639,792.00
  5. Step 5: Solve for x
    x = 1,972,639,792.00/66,515.20
  6. Step 6: Final answer
    x = 29,656.98

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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.