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Finding the Fourth Proportional to 121,321.63, 167,424.51 and 70,364.56

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Solution

The fourth proportional to 121,321.63, 167,424.51 and 70,364.56 is: 97,103.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,321.63 : 167,424.51 = 70,364.56 : x
  2. Step 2: Convert to fraction form
    121,321.63/167,424.51 = 70,364.56/x
  3. Step 3: Cross multiply
    121,321.63x = 167,424.51 × 70,364.56
  4. Step 4: Simplify right side
    121,321.63x = 11,780,751,979.37
  5. Step 5: Solve for x
    x = 11,780,751,979.37/121,321.63
  6. Step 6: Final answer
    x = 97,103.48

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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.