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Finding the Fourth Proportional to 70,800.96, 106,215.90 and 20,876.88

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Solution

The fourth proportional to 70,800.96, 106,215.90 and 20,876.88 is: 31,319.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,800.96 : 106,215.90 = 20,876.88 : x
  2. Step 2: Convert to fraction form
    70,800.96/106,215.90 = 20,876.88/x
  3. Step 3: Cross multiply
    70,800.96x = 106,215.90 × 20,876.88
  4. Step 4: Simplify right side
    70,800.96x = 2,217,456,598.39
  5. Step 5: Solve for x
    x = 2,217,456,598.39/70,800.96
  6. Step 6: Final answer
    x = 31,319.58

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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.