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Finding the Fourth Proportional to 157,578.40, 217,450.20 and 85,957.84

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Solution

The fourth proportional to 157,578.40, 217,450.20 and 85,957.84 is: 118,617.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,578.40 : 217,450.20 = 85,957.84 : x
  2. Step 2: Convert to fraction form
    157,578.40/217,450.20 = 85,957.84/x
  3. Step 3: Cross multiply
    157,578.40x = 217,450.20 × 85,957.84
  4. Step 4: Simplify right side
    157,578.40x = 18,691,549,499.57
  5. Step 5: Solve for x
    x = 18,691,549,499.57/157,578.40
  6. Step 6: Final answer
    x = 118,617.46

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1.5x scale

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.