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Finding the Fourth Proportional to 221,910.34, 306,240.96 and 121,308.34

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Solution

The fourth proportional to 221,910.34, 306,240.96 and 121,308.34 is: 167,408.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,910.34 : 306,240.96 = 121,308.34 : x
  2. Step 2: Convert to fraction form
    221,910.34/306,240.96 = 121,308.34/x
  3. Step 3: Cross multiply
    221,910.34x = 306,240.96 × 121,308.34
  4. Step 4: Simplify right side
    221,910.34x = 37,149,582,497.61
  5. Step 5: Solve for x
    x = 37,149,582,497.61/221,910.34
  6. Step 6: Final answer
    x = 167,408.07

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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.