Home / 128,280.05-192,338.57-112,516.74

Finding the Fourth Proportional to 128,280.05, 192,338.57 and 112,516.74

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Solution

The fourth proportional to 128,280.05, 192,338.57 and 112,516.74 is: 168,703.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,280.05 : 192,338.57 = 112,516.74 : x
  2. Step 2: Convert to fraction form
    128,280.05/192,338.57 = 112,516.74/x
  3. Step 3: Cross multiply
    128,280.05x = 192,338.57 × 112,516.74
  4. Step 4: Simplify right side
    128,280.05x = 21,641,308,872.66
  5. Step 5: Solve for x
    x = 21,641,308,872.66/128,280.05
  6. Step 6: Final answer
    x = 168,703.62

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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.