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Finding the Fourth Proportional to 123,381.47, 170,266.48 and 66,792.84

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Solution

The fourth proportional to 123,381.47, 170,266.48 and 66,792.84 is: 92,174.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,381.47 : 170,266.48 = 66,792.84 : x
  2. Step 2: Convert to fraction form
    123,381.47/170,266.48 = 66,792.84/x
  3. Step 3: Cross multiply
    123,381.47x = 170,266.48 × 66,792.84
  4. Step 4: Simplify right side
    123,381.47x = 11,372,581,756.00
  5. Step 5: Solve for x
    x = 11,372,581,756.00/123,381.47
  6. Step 6: Final answer
    x = 92,174.15

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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.