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Finding the Fourth Proportional to 122,505.51, 169,085.16 and 80,039.64

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Solution

The fourth proportional to 122,505.51, 169,085.16 and 80,039.64 is: 110,472.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,505.51 : 169,085.16 = 80,039.64 : x
  2. Step 2: Convert to fraction form
    122,505.51/169,085.16 = 80,039.64/x
  3. Step 3: Cross multiply
    122,505.51x = 169,085.16 × 80,039.64
  4. Step 4: Simplify right side
    122,505.51x = 13,533,515,335.74
  5. Step 5: Solve for x
    x = 13,533,515,335.74/122,505.51
  6. Step 6: Final answer
    x = 110,472.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.