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Finding the Fourth Proportional to 84,207.90, 125,940.06 and 74,913.42

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Solution

The fourth proportional to 84,207.90, 125,940.06 and 74,913.42 is: 112,039.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,207.90 : 125,940.06 = 74,913.42 : x
  2. Step 2: Convert to fraction form
    84,207.90/125,940.06 = 74,913.42/x
  3. Step 3: Cross multiply
    84,207.90x = 125,940.06 × 74,913.42
  4. Step 4: Simplify right side
    84,207.90x = 9,434,600,609.61
  5. Step 5: Solve for x
    x = 9,434,600,609.61/84,207.90
  6. Step 6: Final answer
    x = 112,039.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.