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Finding the Fourth Proportional to 99,221.64, 148,489.22 and 61,255.32

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Solution

The fourth proportional to 99,221.64, 148,489.22 and 61,255.32 is: 91,671.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,221.64 : 148,489.22 = 61,255.32 : x
  2. Step 2: Convert to fraction form
    99,221.64/148,489.22 = 61,255.32/x
  3. Step 3: Cross multiply
    99,221.64x = 148,489.22 × 61,255.32
  4. Step 4: Simplify right side
    99,221.64x = 9,095,754,687.65
  5. Step 5: Solve for x
    x = 9,095,754,687.65/99,221.64
  6. Step 6: Final answer
    x = 91,671.08

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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.