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Finding the Fourth Proportional to 64,606.70, 89,159.18 and 39,117.73

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Solution

The fourth proportional to 64,606.70, 89,159.18 and 39,117.73 is: 53,983.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,606.70 : 89,159.18 = 39,117.73 : x
  2. Step 2: Convert to fraction form
    64,606.70/89,159.18 = 39,117.73/x
  3. Step 3: Cross multiply
    64,606.70x = 89,159.18 × 39,117.73
  4. Step 4: Simplify right side
    64,606.70x = 3,487,704,088.88
  5. Step 5: Solve for x
    x = 3,487,704,088.88/64,606.70
  6. Step 6: Final answer
    x = 53,983.63

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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.