Home / 123,121.66-169,908.48-72,143.46

Finding the Fourth Proportional to 123,121.66, 169,908.48 and 72,143.46

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Solution

The fourth proportional to 123,121.66, 169,908.48 and 72,143.46 is: 99,558.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,121.66 : 169,908.48 = 72,143.46 : x
  2. Step 2: Convert to fraction form
    123,121.66/169,908.48 = 72,143.46/x
  3. Step 3: Cross multiply
    123,121.66x = 169,908.48 × 72,143.46
  4. Step 4: Simplify right side
    123,121.66x = 12,257,785,630.54
  5. Step 5: Solve for x
    x = 12,257,785,630.54/123,121.66
  6. Step 6: Final answer
    x = 99,558.32

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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.