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Finding the Fourth Proportional to 123,732.84, 170,749.54 and 72,751.44

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Solution

The fourth proportional to 123,732.84, 170,749.54 and 72,751.44 is: 100,395.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,732.84 : 170,749.54 = 72,751.44 : x
  2. Step 2: Convert to fraction form
    123,732.84/170,749.54 = 72,751.44/x
  3. Step 3: Cross multiply
    123,732.84x = 170,749.54 × 72,751.44
  4. Step 4: Simplify right side
    123,732.84x = 12,422,274,914.34
  5. Step 5: Solve for x
    x = 12,422,274,914.34/123,732.84
  6. Step 6: Final answer
    x = 100,395.94

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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.