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Finding the Fourth Proportional to 64,686.40, 89,264.91 and 36,005.11

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Solution

The fourth proportional to 64,686.40, 89,264.91 and 36,005.11 is: 49,685.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,686.40 : 89,264.91 = 36,005.11 : x
  2. Step 2: Convert to fraction form
    64,686.40/89,264.91 = 36,005.11/x
  3. Step 3: Cross multiply
    64,686.40x = 89,264.91 × 36,005.11
  4. Step 4: Simplify right side
    64,686.40x = 3,213,992,903.69
  5. Step 5: Solve for x
    x = 3,213,992,903.69/64,686.40
  6. Step 6: Final answer
    x = 49,685.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.