Home / 128,455.29-192,701.43-39,716.55

Finding the Fourth Proportional to 128,455.29, 192,701.43 and 39,716.55

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Solution

The fourth proportional to 128,455.29, 192,701.43 and 39,716.55 is: 59,580.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,455.29 : 192,701.43 = 39,716.55 : x
  2. Step 2: Convert to fraction form
    128,455.29/192,701.43 = 39,716.55/x
  3. Step 3: Cross multiply
    128,455.29x = 192,701.43 × 39,716.55
  4. Step 4: Simplify right side
    128,455.29x = 7,653,435,979.67
  5. Step 5: Solve for x
    x = 7,653,435,979.67/128,455.29
  6. Step 6: Final answer
    x = 59,580.54

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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.