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Finding the Fourth Proportional to 70,869.92, 106,305.03 and 66,539.66

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Solution

The fourth proportional to 70,869.92, 106,305.03 and 66,539.66 is: 99,809.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,869.92 : 106,305.03 = 66,539.66 : x
  2. Step 2: Convert to fraction form
    70,869.92/106,305.03 = 66,539.66/x
  3. Step 3: Cross multiply
    70,869.92x = 106,305.03 × 66,539.66
  4. Step 4: Simplify right side
    70,869.92x = 7,073,500,818.25
  5. Step 5: Solve for x
    x = 7,073,500,818.25/70,869.92
  6. Step 6: Final answer
    x = 99,809.63

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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.