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Finding the Fourth Proportional to 123,504.50, 170,436.87 and 66,915.87

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Solution

The fourth proportional to 123,504.50, 170,436.87 and 66,915.87 is: 92,344.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,504.50 : 170,436.87 = 66,915.87 : x
  2. Step 2: Convert to fraction form
    123,504.50/170,436.87 = 66,915.87/x
  3. Step 3: Cross multiply
    123,504.50x = 170,436.87 × 66,915.87
  4. Step 4: Simplify right side
    123,504.50x = 11,404,931,436.13
  5. Step 5: Solve for x
    x = 11,404,931,436.13/123,504.50
  6. Step 6: Final answer
    x = 92,344.26

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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.