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Finding the Fourth Proportional to 51,220.80, 76,831.20 and 43,347.60

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Solution

The fourth proportional to 51,220.80, 76,831.20 and 43,347.60 is: 65,021.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,220.80 : 76,831.20 = 43,347.60 : x
  2. Step 2: Convert to fraction form
    51,220.80/76,831.20 = 43,347.60/x
  3. Step 3: Cross multiply
    51,220.80x = 76,831.20 × 43,347.60
  4. Step 4: Simplify right side
    51,220.80x = 3,330,448,125.12
  5. Step 5: Solve for x
    x = 3,330,448,125.12/51,220.80
  6. Step 6: Final answer
    x = 65,021.40

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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.