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Finding the Fourth Proportional to 122,568.80, 183,722.40 and 69,864.80

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Solution

The fourth proportional to 122,568.80, 183,722.40 and 69,864.80 is: 104,722.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,568.80 : 183,722.40 = 69,864.80 : x
  2. Step 2: Convert to fraction form
    122,568.80/183,722.40 = 69,864.80/x
  3. Step 3: Cross multiply
    122,568.80x = 183,722.40 × 69,864.80
  4. Step 4: Simplify right side
    122,568.80x = 12,835,728,731.52
  5. Step 5: Solve for x
    x = 12,835,728,731.52/122,568.80
  6. Step 6: Final answer
    x = 104,722.64

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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.