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Finding the Fourth Proportional to 77,944.80, 116,917.20 and 72,415.20

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Solution

The fourth proportional to 77,944.80, 116,917.20 and 72,415.20 is: 108,622.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,944.80 : 116,917.20 = 72,415.20 : x
  2. Step 2: Convert to fraction form
    77,944.80/116,917.20 = 72,415.20/x
  3. Step 3: Cross multiply
    77,944.80x = 116,917.20 × 72,415.20
  4. Step 4: Simplify right side
    77,944.80x = 8,466,582,421.44
  5. Step 5: Solve for x
    x = 8,466,582,421.44/77,944.80
  6. Step 6: Final answer
    x = 108,622.80

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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.