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Finding the Fourth Proportional to 122,683.80, 183,896.10 and 69,979.80

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Solution

The fourth proportional to 122,683.80, 183,896.10 and 69,979.80 is: 104,895.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,683.80 : 183,896.10 = 69,979.80 : x
  2. Step 2: Convert to fraction form
    122,683.80/183,896.10 = 69,979.80/x
  3. Step 3: Cross multiply
    122,683.80x = 183,896.10 × 69,979.80
  4. Step 4: Simplify right side
    122,683.80x = 12,869,012,298.78
  5. Step 5: Solve for x
    x = 12,869,012,298.78/122,683.80
  6. Step 6: Final answer
    x = 104,895.78

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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.