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Finding the Fourth Proportional to 70,113.52, 105,170.26 and 20,865.52

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Solution

The fourth proportional to 70,113.52, 105,170.26 and 20,865.52 is: 31,298.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,113.52 : 105,170.26 = 20,865.52 : x
  2. Step 2: Convert to fraction form
    70,113.52/105,170.26 = 20,865.52/x
  3. Step 3: Cross multiply
    70,113.52x = 105,170.26 × 20,865.52
  4. Step 4: Simplify right side
    70,113.52x = 2,194,432,163.44
  5. Step 5: Solve for x
    x = 2,194,432,163.44/70,113.52
  6. Step 6: Final answer
    x = 31,298.27

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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.