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Finding the Fourth Proportional to 66,270.10, 99,209.85 and 43,739.22

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Solution

The fourth proportional to 66,270.10, 99,209.85 and 43,739.22 is: 65,479.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,270.10 : 99,209.85 = 43,739.22 : x
  2. Step 2: Convert to fraction form
    66,270.10/99,209.85 = 43,739.22/x
  3. Step 3: Cross multiply
    66,270.10x = 99,209.85 × 43,739.22
  4. Step 4: Simplify right side
    66,270.10x = 4,339,361,455.32
  5. Step 5: Solve for x
    x = 4,339,361,455.32/66,270.10
  6. Step 6: Final answer
    x = 65,479.93

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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.