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Finding the Fourth Proportional to 121,892.57, 168,220.54 and 68,194.88

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Solution

The fourth proportional to 121,892.57, 168,220.54 and 68,194.88 is: 94,113.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,892.57 : 168,220.54 = 68,194.88 : x
  2. Step 2: Convert to fraction form
    121,892.57/168,220.54 = 68,194.88/x
  3. Step 3: Cross multiply
    121,892.57x = 168,220.54 × 68,194.88
  4. Step 4: Simplify right side
    121,892.57x = 11,471,779,538.84
  5. Step 5: Solve for x
    x = 11,471,779,538.84/121,892.57
  6. Step 6: Final answer
    x = 94,113.85

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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.