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Finding the Fourth Proportional to 100,063.39, 149,897.85 and 81,364.54

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Solution

The fourth proportional to 100,063.39, 149,897.85 and 81,364.54 is: 121,886.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,063.39 : 149,897.85 = 81,364.54 : x
  2. Step 2: Convert to fraction form
    100,063.39/149,897.85 = 81,364.54/x
  3. Step 3: Cross multiply
    100,063.39x = 149,897.85 × 81,364.54
  4. Step 4: Simplify right side
    100,063.39x = 12,196,369,205.42
  5. Step 5: Solve for x
    x = 12,196,369,205.42/100,063.39
  6. Step 6: Final answer
    x = 121,886.43

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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.