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Finding the Fourth Proportional to 99,479.90, 137,241.60 and 61,227.90

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Solution

The fourth proportional to 99,479.90, 137,241.60 and 61,227.90 is: 84,469.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,479.90 : 137,241.60 = 61,227.90 : x
  2. Step 2: Convert to fraction form
    99,479.90/137,241.60 = 61,227.90/x
  3. Step 3: Cross multiply
    99,479.90x = 137,241.60 × 61,227.90
  4. Step 4: Simplify right side
    99,479.90x = 8,403,014,960.64
  5. Step 5: Solve for x
    x = 8,403,014,960.64/99,479.90
  6. Step 6: Final answer
    x = 84,469.48

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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.