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Finding the Fourth Proportional to 121,233.60, 181,720.80 and 54,662.40

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Solution

The fourth proportional to 121,233.60, 181,720.80 and 54,662.40 is: 81,935.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,233.60 : 181,720.80 = 54,662.40 : x
  2. Step 2: Convert to fraction form
    121,233.60/181,720.80 = 54,662.40/x
  3. Step 3: Cross multiply
    121,233.60x = 181,720.80 × 54,662.40
  4. Step 4: Simplify right side
    121,233.60x = 9,933,295,057.92
  5. Step 5: Solve for x
    x = 9,933,295,057.92/121,233.60
  6. Step 6: Final answer
    x = 81,935.17

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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.