Home / 66,518.20-99,793.70-19,771.07

Finding the Fourth Proportional to 66,518.20, 99,793.70 and 19,771.07

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Solution

The fourth proportional to 66,518.20, 99,793.70 and 19,771.07 is: 29,661.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,518.20 : 99,793.70 = 19,771.07 : x
  2. Step 2: Convert to fraction form
    66,518.20/99,793.70 = 19,771.07/x
  3. Step 3: Cross multiply
    66,518.20x = 99,793.70 × 19,771.07
  4. Step 4: Simplify right side
    66,518.20x = 1,973,028,129.40
  5. Step 5: Solve for x
    x = 1,973,028,129.40/66,518.20
  6. Step 6: Final answer
    x = 29,661.48

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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.