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Finding the Fourth Proportional to 121,898.46, 168,218.67 and 68,182.86

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Solution

The fourth proportional to 121,898.46, 168,218.67 and 68,182.86 is: 94,091.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,898.46 : 168,218.67 = 68,182.86 : x
  2. Step 2: Convert to fraction form
    121,898.46/168,218.67 = 68,182.86/x
  3. Step 3: Cross multiply
    121,898.46x = 168,218.67 × 68,182.86
  4. Step 4: Simplify right side
    121,898.46x = 11,469,630,026.00
  5. Step 5: Solve for x
    x = 11,469,630,026.00/121,898.46
  6. Step 6: Final answer
    x = 94,091.67

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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.