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Finding the Fourth Proportional to 64,855.92, 96,987.42 and 47,146.08

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Solution

The fourth proportional to 64,855.92, 96,987.42 and 47,146.08 is: 70,503.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,855.92 : 96,987.42 = 47,146.08 : x
  2. Step 2: Convert to fraction form
    64,855.92/96,987.42 = 47,146.08/x
  3. Step 3: Cross multiply
    64,855.92x = 96,987.42 × 47,146.08
  4. Step 4: Simplify right side
    64,855.92x = 4,572,576,662.31
  5. Step 5: Solve for x
    x = 4,572,576,662.31/64,855.92
  6. Step 6: Final answer
    x = 70,503.61

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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.