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Finding the Fourth Proportional to 123,236, 170,064.96 and 66,647.20

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Solution

The fourth proportional to 123,236, 170,064.96 and 66,647.20 is: 91,972.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,236 : 170,064.96 = 66,647.20 : x
  2. Step 2: Convert to fraction form
    123,236/170,064.96 = 66,647.20/x
  3. Step 3: Cross multiply
    123,236x = 170,064.96 × 66,647.20
  4. Step 4: Simplify right side
    123,236x = 11,334,353,402.11
  5. Step 5: Solve for x
    x = 11,334,353,402.11/123,236
  6. Step 6: Final answer
    x = 91,972.75

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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.