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Finding the Fourth Proportional to 69,789.80, 105,064.34 and 63,589.70

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Solution

The fourth proportional to 69,789.80, 105,064.34 and 63,589.70 is: 95,730.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,789.80 : 105,064.34 = 63,589.70 : x
  2. Step 2: Convert to fraction form
    69,789.80/105,064.34 = 63,589.70/x
  3. Step 3: Cross multiply
    69,789.80x = 105,064.34 × 63,589.70
  4. Step 4: Simplify right side
    69,789.80x = 6,681,009,861.30
  5. Step 5: Solve for x
    x = 6,681,009,861.30/69,789.80
  6. Step 6: Final answer
    x = 95,730.46

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.