Home / 128,057.38-192,114.63-39,319.85

Finding the Fourth Proportional to 128,057.38, 192,114.63 and 39,319.85

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Solution

The fourth proportional to 128,057.38, 192,114.63 and 39,319.85 is: 58,988.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,057.38 : 192,114.63 = 39,319.85 : x
  2. Step 2: Convert to fraction form
    128,057.38/192,114.63 = 39,319.85/x
  3. Step 3: Cross multiply
    128,057.38x = 192,114.63 × 39,319.85
  4. Step 4: Simplify right side
    128,057.38x = 7,553,918,914.69
  5. Step 5: Solve for x
    x = 7,553,918,914.69/128,057.38
  6. Step 6: Final answer
    x = 58,988.55

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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.