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Finding the Fourth Proportional to 66,603.20, 99,905.90 and 22,230.18

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Solution

The fourth proportional to 66,603.20, 99,905.90 and 22,230.18 is: 33,345.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,603.20 : 99,905.90 = 22,230.18 : x
  2. Step 2: Convert to fraction form
    66,603.20/99,905.90 = 22,230.18/x
  3. Step 3: Cross multiply
    66,603.20x = 99,905.90 × 22,230.18
  4. Step 4: Simplify right side
    66,603.20x = 2,220,926,028.91
  5. Step 5: Solve for x
    x = 2,220,926,028.91/66,603.20
  6. Step 6: Final answer
    x = 33,345.64

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1.5x scale

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.