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Finding the Fourth Proportional to 123,253.20, 170,089.20 and 66,664.80

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Solution

The fourth proportional to 123,253.20, 170,089.20 and 66,664.80 is: 91,997.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,253.20 : 170,089.20 = 66,664.80 : x
  2. Step 2: Convert to fraction form
    123,253.20/170,089.20 = 66,664.80/x
  3. Step 3: Cross multiply
    123,253.20x = 170,089.20 × 66,664.80
  4. Step 4: Simplify right side
    123,253.20x = 11,338,962,500.16
  5. Step 5: Solve for x
    x = 11,338,962,500.16/123,253.20
  6. Step 6: Final answer
    x = 91,997.31

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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.