Home / 128,120.10-192,180.14-64,930.38

Finding the Fourth Proportional to 128,120.10, 192,180.14 and 64,930.38

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Solution

The fourth proportional to 128,120.10, 192,180.14 and 64,930.38 is: 97,395.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,120.10 : 192,180.14 = 64,930.38 : x
  2. Step 2: Convert to fraction form
    128,120.10/192,180.14 = 64,930.38/x
  3. Step 3: Cross multiply
    128,120.10x = 192,180.14 × 64,930.38
  4. Step 4: Simplify right side
    128,120.10x = 12,478,329,518.65
  5. Step 5: Solve for x
    x = 12,478,329,518.65/128,120.10
  6. Step 6: Final answer
    x = 97,395.56

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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.