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Finding the Fourth Proportional to 70,820.82, 106,248.39 and 20,899.82

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Solution

The fourth proportional to 70,820.82, 106,248.39 and 20,899.82 is: 31,354.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,820.82 : 106,248.39 = 20,899.82 : x
  2. Step 2: Convert to fraction form
    70,820.82/106,248.39 = 20,899.82/x
  3. Step 3: Cross multiply
    70,820.82x = 106,248.39 × 20,899.82
  4. Step 4: Simplify right side
    70,820.82x = 2,220,571,773.42
  5. Step 5: Solve for x
    x = 2,220,571,773.42/70,820.82
  6. Step 6: Final answer
    x = 31,354.79

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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.