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Finding the Fourth Proportional to 99,436.80, 137,221.36 and 54,724.80

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Solution

The fourth proportional to 99,436.80, 137,221.36 and 54,724.80 is: 75,519.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,436.80 : 137,221.36 = 54,724.80 : x
  2. Step 2: Convert to fraction form
    99,436.80/137,221.36 = 54,724.80/x
  3. Step 3: Cross multiply
    99,436.80x = 137,221.36 × 54,724.80
  4. Step 4: Simplify right side
    99,436.80x = 7,509,411,481.73
  5. Step 5: Solve for x
    x = 7,509,411,481.73/99,436.80
  6. Step 6: Final answer
    x = 75,519.44

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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.