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Finding the Fourth Proportional to 84,110.52, 125,913.72 and 81,119.72

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Solution

The fourth proportional to 84,110.52, 125,913.72 and 81,119.72 is: 121,436.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,110.52 : 125,913.72 = 81,119.72 : x
  2. Step 2: Convert to fraction form
    84,110.52/125,913.72 = 81,119.72/x
  3. Step 3: Cross multiply
    84,110.52x = 125,913.72 × 81,119.72
  4. Step 4: Simplify right side
    84,110.52x = 10,214,085,710.56
  5. Step 5: Solve for x
    x = 10,214,085,710.56/84,110.52
  6. Step 6: Final answer
    x = 121,436.48

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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.