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Finding the Fourth Proportional to 84,550.90, 126,831.82 and 28,388.74

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Solution

The fourth proportional to 84,550.90, 126,831.82 and 28,388.74 is: 42,584.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,550.90 : 126,831.82 = 28,388.74 : x
  2. Step 2: Convert to fraction form
    84,550.90/126,831.82 = 28,388.74/x
  3. Step 3: Cross multiply
    84,550.90x = 126,831.82 × 28,388.74
  4. Step 4: Simplify right side
    84,550.90x = 3,600,595,419.76
  5. Step 5: Solve for x
    x = 3,600,595,419.76/84,550.90
  6. Step 6: Final answer
    x = 42,584.94

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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.