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Finding the Fourth Proportional to 99,634.78, 137,494.88 and 54,311.77

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Solution

The fourth proportional to 99,634.78, 137,494.88 and 54,311.77 is: 74,949.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,634.78 : 137,494.88 = 54,311.77 : x
  2. Step 2: Convert to fraction form
    99,634.78/137,494.88 = 54,311.77/x
  3. Step 3: Cross multiply
    99,634.78x = 137,494.88 × 54,311.77
  4. Step 4: Simplify right side
    99,634.78x = 7,467,590,298.74
  5. Step 5: Solve for x
    x = 7,467,590,298.74/99,634.78
  6. Step 6: Final answer
    x = 74,949.63

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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.