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Finding the Fourth Proportional to 57,734.70, 86,521.05 and 45,908.70

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Solution

The fourth proportional to 57,734.70, 86,521.05 and 45,908.70 is: 68,798.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,734.70 : 86,521.05 = 45,908.70 : x
  2. Step 2: Convert to fraction form
    57,734.70/86,521.05 = 45,908.70/x
  3. Step 3: Cross multiply
    57,734.70x = 86,521.05 × 45,908.70
  4. Step 4: Simplify right side
    57,734.70x = 3,972,068,928.14
  5. Step 5: Solve for x
    x = 3,972,068,928.14/57,734.70
  6. Step 6: Final answer
    x = 68,798.64

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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.