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Finding the Fourth Proportional to 123,108.40, 169,889.32 and 66,519.77

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Solution

The fourth proportional to 123,108.40, 169,889.32 and 66,519.77 is: 91,797.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,108.40 : 169,889.32 = 66,519.77 : x
  2. Step 2: Convert to fraction form
    123,108.40/169,889.32 = 66,519.77/x
  3. Step 3: Cross multiply
    123,108.40x = 169,889.32 × 66,519.77
  4. Step 4: Simplify right side
    123,108.40x = 11,300,998,750.28
  5. Step 5: Solve for x
    x = 11,300,998,750.28/123,108.40
  6. Step 6: Final answer
    x = 91,797.14

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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.