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Finding the Fourth Proportional to 57,628.76, 79,474.83 and 39,505.82

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Solution

The fourth proportional to 57,628.76, 79,474.83 and 39,505.82 is: 54,481.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,628.76 : 79,474.83 = 39,505.82 : x
  2. Step 2: Convert to fraction form
    57,628.76/79,474.83 = 39,505.82/x
  3. Step 3: Cross multiply
    57,628.76x = 79,474.83 × 39,505.82
  4. Step 4: Simplify right side
    57,628.76x = 3,139,717,931.14
  5. Step 5: Solve for x
    x = 3,139,717,931.14/57,628.76
  6. Step 6: Final answer
    x = 54,481.79

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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.