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Finding the Fourth Proportional to 122,928.36, 169,646.37 and 68,480.46

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Solution

The fourth proportional to 122,928.36, 169,646.37 and 68,480.46 is: 94,505.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,928.36 : 169,646.37 = 68,480.46 : x
  2. Step 2: Convert to fraction form
    122,928.36/169,646.37 = 68,480.46/x
  3. Step 3: Cross multiply
    122,928.36x = 169,646.37 × 68,480.46
  4. Step 4: Simplify right side
    122,928.36x = 11,617,461,454.93
  5. Step 5: Solve for x
    x = 11,617,461,454.93/122,928.36
  6. Step 6: Final answer
    x = 94,505.95

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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.