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Finding the Fourth Proportional to 99,620.64, 137,476.49 and 54,908.64

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Solution

The fourth proportional to 99,620.64, 137,476.49 and 54,908.64 is: 75,773.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,620.64 : 137,476.49 = 54,908.64 : x
  2. Step 2: Convert to fraction form
    99,620.64/137,476.49 = 54,908.64/x
  3. Step 3: Cross multiply
    99,620.64x = 137,476.49 × 54,908.64
  4. Step 4: Simplify right side
    99,620.64x = 7,548,646,823.33
  5. Step 5: Solve for x
    x = 7,548,646,823.33/99,620.64
  6. Step 6: Final answer
    x = 75,773.92

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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.