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Finding the Fourth Proportional to 77,221.20, 115,831.80 and 27,300.90

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Solution

The fourth proportional to 77,221.20, 115,831.80 and 27,300.90 is: 40,951.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,221.20 : 115,831.80 = 27,300.90 : x
  2. Step 2: Convert to fraction form
    77,221.20/115,831.80 = 27,300.90/x
  3. Step 3: Cross multiply
    77,221.20x = 115,831.80 × 27,300.90
  4. Step 4: Simplify right side
    77,221.20x = 3,162,312,388.62
  5. Step 5: Solve for x
    x = 3,162,312,388.62/77,221.20
  6. Step 6: Final answer
    x = 40,951.35

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Similar ratio
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1.5x scale

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.