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Finding the Fourth Proportional to 69,087.80, 103,611.54 and 31,626.68

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Solution

The fourth proportional to 69,087.80, 103,611.54 and 31,626.68 is: 47,430.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,087.80 : 103,611.54 = 31,626.68 : x
  2. Step 2: Convert to fraction form
    69,087.80/103,611.54 = 31,626.68/x
  3. Step 3: Cross multiply
    69,087.80x = 103,611.54 × 31,626.68
  4. Step 4: Simplify right side
    69,087.80x = 3,276,889,019.89
  5. Step 5: Solve for x
    x = 3,276,889,019.89/69,087.80
  6. Step 6: Final answer
    x = 47,430.79

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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.