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Finding the Fourth Proportional to 157,208.20, 235,664.06 and 78,247.78

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Solution

The fourth proportional to 157,208.20, 235,664.06 and 78,247.78 is: 117,297.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,208.20 : 235,664.06 = 78,247.78 : x
  2. Step 2: Convert to fraction form
    157,208.20/235,664.06 = 78,247.78/x
  3. Step 3: Cross multiply
    157,208.20x = 235,664.06 × 78,247.78
  4. Step 4: Simplify right side
    157,208.20x = 18,440,189,520.79
  5. Step 5: Solve for x
    x = 18,440,189,520.79/157,208.20
  6. Step 6: Final answer
    x = 117,297.89

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1.5x scale

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.