Home / 71,128.43-106,691.58-21,208.74

Finding the Fourth Proportional to 71,128.43, 106,691.58 and 21,208.74

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Solution

The fourth proportional to 71,128.43, 106,691.58 and 21,208.74 is: 31,812.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,128.43 : 106,691.58 = 21,208.74 : x
  2. Step 2: Convert to fraction form
    71,128.43/106,691.58 = 21,208.74/x
  3. Step 3: Cross multiply
    71,128.43x = 106,691.58 × 21,208.74
  4. Step 4: Simplify right side
    71,128.43x = 2,262,793,580.32
  5. Step 5: Solve for x
    x = 2,262,793,580.32/71,128.43
  6. Step 6: Final answer
    x = 31,812.79

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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.