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Finding the Fourth Proportional to 122,672.82, 169,416.99 and 84,531.54

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Solution

The fourth proportional to 122,672.82, 169,416.99 and 84,531.54 is: 116,742.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,672.82 : 169,416.99 = 84,531.54 : x
  2. Step 2: Convert to fraction form
    122,672.82/169,416.99 = 84,531.54/x
  3. Step 3: Cross multiply
    122,672.82x = 169,416.99 × 84,531.54
  4. Step 4: Simplify right side
    122,672.82x = 14,321,079,066.86
  5. Step 5: Solve for x
    x = 14,321,079,066.86/122,672.82
  6. Step 6: Final answer
    x = 116,742.07

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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.