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Finding the Fourth Proportional to 52,489.72, 78,660.90 and 28,736.20

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Solution

The fourth proportional to 52,489.72, 78,660.90 and 28,736.20 is: 43,063.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,489.72 : 78,660.90 = 28,736.20 : x
  2. Step 2: Convert to fraction form
    52,489.72/78,660.90 = 28,736.20/x
  3. Step 3: Cross multiply
    52,489.72x = 78,660.90 × 28,736.20
  4. Step 4: Simplify right side
    52,489.72x = 2,260,415,354.58
  5. Step 5: Solve for x
    x = 2,260,415,354.58/52,489.72
  6. Step 6: Final answer
    x = 43,063.96

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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.