Home / 128,229.47-192,172.25-99,800.75

Finding the Fourth Proportional to 128,229.47, 192,172.25 and 99,800.75

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Solution

The fourth proportional to 128,229.47, 192,172.25 and 99,800.75 is: 149,567.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,229.47 : 192,172.25 = 99,800.75 : x
  2. Step 2: Convert to fraction form
    128,229.47/192,172.25 = 99,800.75/x
  3. Step 3: Cross multiply
    128,229.47x = 192,172.25 × 99,800.75
  4. Step 4: Simplify right side
    128,229.47x = 19,178,934,679.19
  5. Step 5: Solve for x
    x = 19,178,934,679.19/128,229.47
  6. Step 6: Final answer
    x = 149,567.29

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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.