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Finding the Fourth Proportional to 121,759.96, 168,035.16 and 74,005.60

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Solution

The fourth proportional to 121,759.96, 168,035.16 and 74,005.60 is: 102,131.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,759.96 : 168,035.16 = 74,005.60 : x
  2. Step 2: Convert to fraction form
    121,759.96/168,035.16 = 74,005.60/x
  3. Step 3: Cross multiply
    121,759.96x = 168,035.16 × 74,005.60
  4. Step 4: Simplify right side
    121,759.96x = 12,435,542,836.90
  5. Step 5: Solve for x
    x = 12,435,542,836.90/121,759.96
  6. Step 6: Final answer
    x = 102,131.63

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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.