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Finding the Fourth Proportional to 122,608.64, 183,911.78 and 72,652.78

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Solution

The fourth proportional to 122,608.64, 183,911.78 and 72,652.78 is: 108,978.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,608.64 : 183,911.78 = 72,652.78 : x
  2. Step 2: Convert to fraction form
    122,608.64/183,911.78 = 72,652.78/x
  3. Step 3: Cross multiply
    122,608.64x = 183,911.78 × 72,652.78
  4. Step 4: Simplify right side
    122,608.64x = 13,361,702,091.75
  5. Step 5: Solve for x
    x = 13,361,702,091.75/122,608.64
  6. Step 6: Final answer
    x = 108,978.47

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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.