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Finding the Fourth Proportional to 93,686.70, 140,530.05 and 83,845.20

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Solution

The fourth proportional to 93,686.70, 140,530.05 and 83,845.20 is: 125,767.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,686.70 : 140,530.05 = 83,845.20 : x
  2. Step 2: Convert to fraction form
    93,686.70/140,530.05 = 83,845.20/x
  3. Step 3: Cross multiply
    93,686.70x = 140,530.05 × 83,845.20
  4. Step 4: Simplify right side
    93,686.70x = 11,782,770,148.26
  5. Step 5: Solve for x
    x = 11,782,770,148.26/93,686.70
  6. Step 6: Final answer
    x = 125,767.80

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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.