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Finding the Fourth Proportional to 99,540.84, 137,356.40 and 61,294.28

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Solution

The fourth proportional to 99,540.84, 137,356.40 and 61,294.28 is: 84,579.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,540.84 : 137,356.40 = 61,294.28 : x
  2. Step 2: Convert to fraction form
    99,540.84/137,356.40 = 61,294.28/x
  3. Step 3: Cross multiply
    99,540.84x = 137,356.40 × 61,294.28
  4. Step 4: Simplify right side
    99,540.84x = 8,419,161,641.39
  5. Step 5: Solve for x
    x = 8,419,161,641.39/99,540.84
  6. Step 6: Final answer
    x = 84,579.97

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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.