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Finding the Fourth Proportional to 121,761.63, 168,052.73 and 70,790.56

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Solution

The fourth proportional to 121,761.63, 168,052.73 and 70,790.56 is: 97,703.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,761.63 : 168,052.73 = 70,790.56 : x
  2. Step 2: Convert to fraction form
    121,761.63/168,052.73 = 70,790.56/x
  3. Step 3: Cross multiply
    121,761.63x = 168,052.73 × 70,790.56
  4. Step 4: Simplify right side
    121,761.63x = 11,896,546,092.14
  5. Step 5: Solve for x
    x = 11,896,546,092.14/121,761.63
  6. Step 6: Final answer
    x = 97,703.57

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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.