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Finding the Fourth Proportional to 137,698.25, 189,916.45 and 99,600.71

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Solution

The fourth proportional to 137,698.25, 189,916.45 and 99,600.71 is: 137,371.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,698.25 : 189,916.45 = 99,600.71 : x
  2. Step 2: Convert to fraction form
    137,698.25/189,916.45 = 99,600.71/x
  3. Step 3: Cross multiply
    137,698.25x = 189,916.45 × 99,600.71
  4. Step 4: Simplify right side
    137,698.25x = 18,915,812,062.10
  5. Step 5: Solve for x
    x = 18,915,812,062.10/137,698.25
  6. Step 6: Final answer
    x = 137,371.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.