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Finding the Fourth Proportional to 221,071.77, 331,672.23 and 71,308.74

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Solution

The fourth proportional to 221,071.77, 331,672.23 and 71,308.74 is: 106,983.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,071.77 : 331,672.23 = 71,308.74 : x
  2. Step 2: Convert to fraction form
    221,071.77/331,672.23 = 71,308.74/x
  3. Step 3: Cross multiply
    221,071.77x = 331,672.23 × 71,308.74
  4. Step 4: Simplify right side
    221,071.77x = 23,651,128,814.29
  5. Step 5: Solve for x
    x = 23,651,128,814.29/221,071.77
  6. Step 6: Final answer
    x = 106,983.94

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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.