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Finding the Fourth Proportional to 121,909.52, 168,234.36 and 68,194.28

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Solution

The fourth proportional to 121,909.52, 168,234.36 and 68,194.28 is: 94,107.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,909.52 : 168,234.36 = 68,194.28 : x
  2. Step 2: Convert to fraction form
    121,909.52/168,234.36 = 68,194.28/x
  3. Step 3: Cross multiply
    121,909.52x = 168,234.36 × 68,194.28
  4. Step 4: Simplify right side
    121,909.52x = 11,472,621,051.46
  5. Step 5: Solve for x
    x = 11,472,621,051.46/121,909.52
  6. Step 6: Final answer
    x = 94,107.67

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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.