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Finding the Fourth Proportional to 157,763.85, 217,722.98 and 86,150.55

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Solution

The fourth proportional to 157,763.85, 217,722.98 and 86,150.55 is: 118,892.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,763.85 : 217,722.98 = 86,150.55 : x
  2. Step 2: Convert to fraction form
    157,763.85/217,722.98 = 86,150.55/x
  3. Step 3: Cross multiply
    157,763.85x = 217,722.98 × 86,150.55
  4. Step 4: Simplify right side
    157,763.85x = 18,756,954,043.89
  5. Step 5: Solve for x
    x = 18,756,954,043.89/157,763.85
  6. Step 6: Final answer
    x = 118,892.60

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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.