Home / 121,915.19-168,236.20-68,189.83

Finding the Fourth Proportional to 121,915.19, 168,236.20 and 68,189.83

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Solution

The fourth proportional to 121,915.19, 168,236.20 and 68,189.83 is: 94,098.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,915.19 : 168,236.20 = 68,189.83 : x
  2. Step 2: Convert to fraction form
    121,915.19/168,236.20 = 68,189.83/x
  3. Step 3: Cross multiply
    121,915.19x = 168,236.20 × 68,189.83
  4. Step 4: Simplify right side
    121,915.19x = 11,471,997,587.29
  5. Step 5: Solve for x
    x = 11,471,997,587.29/121,915.19
  6. Step 6: Final answer
    x = 94,098.18

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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.