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Finding the Fourth Proportional to 121,058.48, 166,992.45 and 72,648.02

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Solution

The fourth proportional to 121,058.48, 166,992.45 and 72,648.02 is: 100,213.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,058.48 : 166,992.45 = 72,648.02 : x
  2. Step 2: Convert to fraction form
    121,058.48/166,992.45 = 72,648.02/x
  3. Step 3: Cross multiply
    121,058.48x = 166,992.45 × 72,648.02
  4. Step 4: Simplify right side
    121,058.48x = 12,131,670,847.45
  5. Step 5: Solve for x
    x = 12,131,670,847.45/121,058.48
  6. Step 6: Final answer
    x = 100,213.31

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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.