Home / 128,330.25-192,431.11-39,572.22

Finding the Fourth Proportional to 128,330.25, 192,431.11 and 39,572.22

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Solution

The fourth proportional to 128,330.25, 192,431.11 and 39,572.22 is: 59,338.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,330.25 : 192,431.11 = 39,572.22 : x
  2. Step 2: Convert to fraction form
    128,330.25/192,431.11 = 39,572.22/x
  3. Step 3: Cross multiply
    128,330.25x = 192,431.11 × 39,572.22
  4. Step 4: Simplify right side
    128,330.25x = 7,614,926,219.76
  5. Step 5: Solve for x
    x = 7,614,926,219.76/128,330.25
  6. Step 6: Final answer
    x = 59,338.51

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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.