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Finding the Fourth Proportional to 64,411.20, 96,616.80 and 33,307.20

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Solution

The fourth proportional to 64,411.20, 96,616.80 and 33,307.20 is: 49,960.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,411.20 : 96,616.80 = 33,307.20 : x
  2. Step 2: Convert to fraction form
    64,411.20/96,616.80 = 33,307.20/x
  3. Step 3: Cross multiply
    64,411.20x = 96,616.80 × 33,307.20
  4. Step 4: Simplify right side
    64,411.20x = 3,218,035,080.96
  5. Step 5: Solve for x
    x = 3,218,035,080.96/64,411.20
  6. Step 6: Final answer
    x = 49,960.80

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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.