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Finding the Fourth Proportional to 121,058.68, 166,966.44 and 103,212.76

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Solution

The fourth proportional to 121,058.68, 166,966.44 and 103,212.76 is: 142,353.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,058.68 : 166,966.44 = 103,212.76 : x
  2. Step 2: Convert to fraction form
    121,058.68/166,966.44 = 103,212.76/x
  3. Step 3: Cross multiply
    121,058.68x = 166,966.44 × 103,212.76
  4. Step 4: Simplify right side
    121,058.68x = 17,233,067,099.77
  5. Step 5: Solve for x
    x = 17,233,067,099.77/121,058.68
  6. Step 6: Final answer
    x = 142,353.01

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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.