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Finding the Fourth Proportional to 128,575.12, 192,893.47 and 53,653.59

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Solution

The fourth proportional to 128,575.12, 192,893.47 and 53,653.59 is: 80,493.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,575.12 : 192,893.47 = 53,653.59 : x
  2. Step 2: Convert to fraction form
    128,575.12/192,893.47 = 53,653.59/x
  3. Step 3: Cross multiply
    128,575.12x = 192,893.47 × 53,653.59
  4. Step 4: Simplify right side
    128,575.12x = 10,349,427,153.06
  5. Step 5: Solve for x
    x = 10,349,427,153.06/128,575.12
  6. Step 6: Final answer
    x = 80,493.23

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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.