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Finding the Fourth Proportional to 149,903.61, 206,874.99 and 86,251.11

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Solution

The fourth proportional to 149,903.61, 206,874.99 and 86,251.11 is: 119,031.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,903.61 : 206,874.99 = 86,251.11 : x
  2. Step 2: Convert to fraction form
    149,903.61/206,874.99 = 86,251.11/x
  3. Step 3: Cross multiply
    149,903.61x = 206,874.99 × 86,251.11
  4. Step 4: Simplify right side
    149,903.61x = 17,843,197,518.74
  5. Step 5: Solve for x
    x = 17,843,197,518.74/149,903.61
  6. Step 6: Final answer
    x = 119,031.14

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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.