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Finding the Fourth Proportional to 76,754.36, 105,934.56 and 57,469.88

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Solution

The fourth proportional to 76,754.36, 105,934.56 and 57,469.88 is: 79,318.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,754.36 : 105,934.56 = 57,469.88 : x
  2. Step 2: Convert to fraction form
    76,754.36/105,934.56 = 57,469.88/x
  3. Step 3: Cross multiply
    76,754.36x = 105,934.56 × 57,469.88
  4. Step 4: Simplify right side
    76,754.36x = 6,088,046,451.05
  5. Step 5: Solve for x
    x = 6,088,046,451.05/76,754.36
  6. Step 6: Final answer
    x = 79,318.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.