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Finding the Fourth Proportional to 51,998.40, 77,997.60 and 51,220.80

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Solution

The fourth proportional to 51,998.40, 77,997.60 and 51,220.80 is: 76,831.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,998.40 : 77,997.60 = 51,220.80 : x
  2. Step 2: Convert to fraction form
    51,998.40/77,997.60 = 51,220.80/x
  3. Step 3: Cross multiply
    51,998.40x = 77,997.60 × 51,220.80
  4. Step 4: Simplify right side
    51,998.40x = 3,995,099,470.08
  5. Step 5: Solve for x
    x = 3,995,099,470.08/51,998.40
  6. Step 6: Final answer
    x = 76,831.20

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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.