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Finding the Fourth Proportional to 123,566.89, 170,522.15 and 66,978.25

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Solution

The fourth proportional to 123,566.89, 170,522.15 and 66,978.25 is: 92,429.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,566.89 : 170,522.15 = 66,978.25 : x
  2. Step 2: Convert to fraction form
    123,566.89/170,522.15 = 66,978.25/x
  3. Step 3: Cross multiply
    123,566.89x = 170,522.15 × 66,978.25
  4. Step 4: Simplify right side
    123,566.89x = 11,421,274,858.35
  5. Step 5: Solve for x
    x = 11,421,274,858.35/123,566.89
  6. Step 6: Final answer
    x = 92,429.90

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1.5x scale

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.