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Finding the Fourth Proportional to 85,796.80, 128,635.20 and 50,718.40

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Solution

The fourth proportional to 85,796.80, 128,635.20 and 50,718.40 is: 76,042.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,796.80 : 128,635.20 = 50,718.40 : x
  2. Step 2: Convert to fraction form
    85,796.80/128,635.20 = 50,718.40/x
  3. Step 3: Cross multiply
    85,796.80x = 128,635.20 × 50,718.40
  4. Step 4: Simplify right side
    85,796.80x = 6,524,171,527.68
  5. Step 5: Solve for x
    x = 6,524,171,527.68/85,796.80
  6. Step 6: Final answer
    x = 76,042.13

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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.