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Finding the Fourth Proportional to 69,338.40, 104,007.60 and 66,616.80

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Solution

The fourth proportional to 69,338.40, 104,007.60 and 66,616.80 is: 99,925.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,338.40 : 104,007.60 = 66,616.80 : x
  2. Step 2: Convert to fraction form
    69,338.40/104,007.60 = 66,616.80/x
  3. Step 3: Cross multiply
    69,338.40x = 104,007.60 × 66,616.80
  4. Step 4: Simplify right side
    69,338.40x = 6,928,653,487.68
  5. Step 5: Solve for x
    x = 6,928,653,487.68/69,338.40
  6. Step 6: Final answer
    x = 99,925.20

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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.