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Finding the Fourth Proportional to 221,368.92, 331,856.14 and 81,094.74

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Solution

The fourth proportional to 221,368.92, 331,856.14 and 81,094.74 is: 121,569.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,368.92 : 331,856.14 = 81,094.74 : x
  2. Step 2: Convert to fraction form
    221,368.92/331,856.14 = 81,094.74/x
  3. Step 3: Cross multiply
    221,368.92x = 331,856.14 × 81,094.74
  4. Step 4: Simplify right side
    221,368.92x = 26,911,787,390.70
  5. Step 5: Solve for x
    x = 26,911,787,390.70/221,368.92
  6. Step 6: Final answer
    x = 121,569.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.