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Finding the Fourth Proportional to 123,670.80, 185,608.60 and 57,213.20

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Solution

The fourth proportional to 123,670.80, 185,608.60 and 57,213.20 is: 85,867.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,670.80 : 185,608.60 = 57,213.20 : x
  2. Step 2: Convert to fraction form
    123,670.80/185,608.60 = 57,213.20/x
  3. Step 3: Cross multiply
    123,670.80x = 185,608.60 × 57,213.20
  4. Step 4: Simplify right side
    123,670.80x = 10,619,261,953.52
  5. Step 5: Solve for x
    x = 10,619,261,953.52/123,670.80
  6. Step 6: Final answer
    x = 85,867.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.