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Finding the Fourth Proportional to 121,030.86, 166,954.42 and 72,620.27

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Solution

The fourth proportional to 121,030.86, 166,954.42 and 72,620.27 is: 100,175.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,030.86 : 166,954.42 = 72,620.27 : x
  2. Step 2: Convert to fraction form
    121,030.86/166,954.42 = 72,620.27/x
  3. Step 3: Cross multiply
    121,030.86x = 166,954.42 × 72,620.27
  4. Step 4: Simplify right side
    121,030.86x = 12,124,275,058.09
  5. Step 5: Solve for x
    x = 12,124,275,058.09/121,030.86
  6. Step 6: Final answer
    x = 100,175.07

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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.