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Finding the Fourth Proportional to 118,058.81, 162,921.92 and 64,343.66

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Solution

The fourth proportional to 118,058.81, 162,921.92 and 64,343.66 is: 88,794.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,058.81 : 162,921.92 = 64,343.66 : x
  2. Step 2: Convert to fraction form
    118,058.81/162,921.92 = 64,343.66/x
  3. Step 3: Cross multiply
    118,058.81x = 162,921.92 × 64,343.66
  4. Step 4: Simplify right side
    118,058.81x = 10,482,991,490.70
  5. Step 5: Solve for x
    x = 10,482,991,490.70/118,058.81
  6. Step 6: Final answer
    x = 88,794.66

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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.