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Finding the Fourth Proportional to 70,695.12, 106,039.32 and 20,773.20

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Solution

The fourth proportional to 70,695.12, 106,039.32 and 20,773.20 is: 31,158.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,695.12 : 106,039.32 = 20,773.20 : x
  2. Step 2: Convert to fraction form
    70,695.12/106,039.32 = 20,773.20/x
  3. Step 3: Cross multiply
    70,695.12x = 106,039.32 × 20,773.20
  4. Step 4: Simplify right side
    70,695.12x = 2,202,776,002.22
  5. Step 5: Solve for x
    x = 2,202,776,002.22/70,695.12
  6. Step 6: Final answer
    x = 31,158.81

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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.