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Finding the Fourth Proportional to 69,660.45, 96,129.72 and 39,447.45

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Solution

The fourth proportional to 69,660.45, 96,129.72 and 39,447.45 is: 54,436.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,660.45 : 96,129.72 = 39,447.45 : x
  2. Step 2: Convert to fraction form
    69,660.45/96,129.72 = 39,447.45/x
  3. Step 3: Cross multiply
    69,660.45x = 96,129.72 × 39,447.45
  4. Step 4: Simplify right side
    69,660.45x = 3,792,072,323.21
  5. Step 5: Solve for x
    x = 3,792,072,323.21/69,660.45
  6. Step 6: Final answer
    x = 54,436.52

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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.