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Finding the Fourth Proportional to 121,087.80, 181,763.64 and 91,825.56

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Solution

The fourth proportional to 121,087.80, 181,763.64 and 91,825.56 is: 137,838.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,087.80 : 181,763.64 = 91,825.56 : x
  2. Step 2: Convert to fraction form
    121,087.80/181,763.64 = 91,825.56/x
  3. Step 3: Cross multiply
    121,087.80x = 181,763.64 × 91,825.56
  4. Step 4: Simplify right side
    121,087.80x = 16,690,548,030.64
  5. Step 5: Solve for x
    x = 16,690,548,030.64/121,087.80
  6. Step 6: Final answer
    x = 137,838.40

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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.