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Finding the Fourth Proportional to 81,403.94, 121,958.25 and 60,109.37

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Solution

The fourth proportional to 81,403.94, 121,958.25 and 60,109.37 is: 90,055.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,403.94 : 121,958.25 = 60,109.37 : x
  2. Step 2: Convert to fraction form
    81,403.94/121,958.25 = 60,109.37/x
  3. Step 3: Cross multiply
    81,403.94x = 121,958.25 × 60,109.37
  4. Step 4: Simplify right side
    81,403.94x = 7,330,832,964.01
  5. Step 5: Solve for x
    x = 7,330,832,964.01/81,403.94
  6. Step 6: Final answer
    x = 90,055.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.