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Finding the Fourth Proportional to 128,197.53, 192,314.51 and 39,458.43

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Solution

The fourth proportional to 128,197.53, 192,314.51 and 39,458.43 is: 59,193.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,197.53 : 192,314.51 = 39,458.43 : x
  2. Step 2: Convert to fraction form
    128,197.53/192,314.51 = 39,458.43/x
  3. Step 3: Cross multiply
    128,197.53x = 192,314.51 × 39,458.43
  4. Step 4: Simplify right side
    128,197.53x = 7,588,428,248.68
  5. Step 5: Solve for x
    x = 7,588,428,248.68/128,197.53
  6. Step 6: Final answer
    x = 59,193.25

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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.