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Finding the Fourth Proportional to 66,616.47, 99,679.86 and 63,009.72

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Solution

The fourth proportional to 66,616.47, 99,679.86 and 63,009.72 is: 94,282.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,616.47 : 99,679.86 = 63,009.72 : x
  2. Step 2: Convert to fraction form
    66,616.47/99,679.86 = 63,009.72/x
  3. Step 3: Cross multiply
    66,616.47x = 99,679.86 × 63,009.72
  4. Step 4: Simplify right side
    66,616.47x = 6,280,800,068.24
  5. Step 5: Solve for x
    x = 6,280,800,068.24/66,616.47
  6. Step 6: Final answer
    x = 94,282.99

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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.