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Finding the Fourth Proportional to 122,569.80, 183,723.90 and 69,865.80

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Solution

The fourth proportional to 122,569.80, 183,723.90 and 69,865.80 is: 104,724.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,569.80 : 183,723.90 = 69,865.80 : x
  2. Step 2: Convert to fraction form
    122,569.80/183,723.90 = 69,865.80/x
  3. Step 3: Cross multiply
    122,569.80x = 183,723.90 × 69,865.80
  4. Step 4: Simplify right side
    122,569.80x = 12,836,017,252.62
  5. Step 5: Solve for x
    x = 12,836,017,252.62/122,569.80
  6. Step 6: Final answer
    x = 104,724.14

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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.