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Finding the Fourth Proportional to 123,710.70, 170,721.50 and 67,122.03

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Solution

The fourth proportional to 123,710.70, 170,721.50 and 67,122.03 is: 92,628.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,710.70 : 170,721.50 = 67,122.03 : x
  2. Step 2: Convert to fraction form
    123,710.70/170,721.50 = 67,122.03/x
  3. Step 3: Cross multiply
    123,710.70x = 170,721.50 × 67,122.03
  4. Step 4: Simplify right side
    123,710.70x = 11,459,173,309.03
  5. Step 5: Solve for x
    x = 11,459,173,309.03/123,710.70
  6. Step 6: Final answer
    x = 92,628.80

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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.