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Finding the Fourth Proportional to 69,439.91, 104,119.76 and 61,136.60

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Solution

The fourth proportional to 69,439.91, 104,119.76 and 61,136.60 is: 91,669.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,439.91 : 104,119.76 = 61,136.60 : x
  2. Step 2: Convert to fraction form
    69,439.91/104,119.76 = 61,136.60/x
  3. Step 3: Cross multiply
    69,439.91x = 104,119.76 × 61,136.60
  4. Step 4: Simplify right side
    69,439.91x = 6,365,527,751.46
  5. Step 5: Solve for x
    x = 6,365,527,751.46/69,439.91
  6. Step 6: Final answer
    x = 91,669.59

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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.