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Finding the Fourth Proportional to 52,403.40, 78,489.90 and 51,251.40

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Solution

The fourth proportional to 52,403.40, 78,489.90 and 51,251.40 is: 76,764.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,403.40 : 78,489.90 = 51,251.40 : x
  2. Step 2: Convert to fraction form
    52,403.40/78,489.90 = 51,251.40/x
  3. Step 3: Cross multiply
    52,403.40x = 78,489.90 × 51,251.40
  4. Step 4: Simplify right side
    52,403.40x = 4,022,717,260.86
  5. Step 5: Solve for x
    x = 4,022,717,260.86/52,403.40
  6. Step 6: Final answer
    x = 76,764.43

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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.