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Finding the Fourth Proportional to 122,495.36, 169,039.32 and 74,828.48

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Solution

The fourth proportional to 122,495.36, 169,039.32 and 74,828.48 is: 103,260.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,495.36 : 169,039.32 = 74,828.48 : x
  2. Step 2: Convert to fraction form
    122,495.36/169,039.32 = 74,828.48/x
  3. Step 3: Cross multiply
    122,495.36x = 169,039.32 × 74,828.48
  4. Step 4: Simplify right side
    122,495.36x = 12,648,955,375.83
  5. Step 5: Solve for x
    x = 12,648,955,375.83/122,495.36
  6. Step 6: Final answer
    x = 103,260.69

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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.