Home / 99,916.32-137,824.20-65,912.73

Finding the Fourth Proportional to 99,916.32, 137,824.20 and 65,912.73

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Solution

The fourth proportional to 99,916.32, 137,824.20 and 65,912.73 is: 90,919.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,916.32 : 137,824.20 = 65,912.73 : x
  2. Step 2: Convert to fraction form
    99,916.32/137,824.20 = 65,912.73/x
  3. Step 3: Cross multiply
    99,916.32x = 137,824.20 × 65,912.73
  4. Step 4: Simplify right side
    99,916.32x = 9,084,369,282.07
  5. Step 5: Solve for x
    x = 9,084,369,282.07/99,916.32
  6. Step 6: Final answer
    x = 90,919.77

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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.