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Finding the Fourth Proportional to 123,265.17, 170,110.80 and 72,270.81

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Solution

The fourth proportional to 123,265.17, 170,110.80 and 72,270.81 is: 99,736.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,265.17 : 170,110.80 = 72,270.81 : x
  2. Step 2: Convert to fraction form
    123,265.17/170,110.80 = 72,270.81/x
  3. Step 3: Cross multiply
    123,265.17x = 170,110.80 × 72,270.81
  4. Step 4: Simplify right side
    123,265.17x = 12,294,045,305.75
  5. Step 5: Solve for x
    x = 12,294,045,305.75/123,265.17
  6. Step 6: Final answer
    x = 99,736.57

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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.