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Finding the Fourth Proportional to 122,606.64, 183,908.78 and 72,650.77

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Solution

The fourth proportional to 122,606.64, 183,908.78 and 72,650.77 is: 108,975.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,606.64 : 183,908.78 = 72,650.77 : x
  2. Step 2: Convert to fraction form
    122,606.64/183,908.78 = 72,650.77/x
  3. Step 3: Cross multiply
    122,606.64x = 183,908.78 × 72,650.77
  4. Step 4: Simplify right side
    122,606.64x = 13,361,114,960.66
  5. Step 5: Solve for x
    x = 13,361,114,960.66/122,606.64
  6. Step 6: Final answer
    x = 108,975.46

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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.