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Finding the Fourth Proportional to 121,055.92, 181,449.36 and 91,377.52

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Solution

The fourth proportional to 121,055.92, 181,449.36 and 91,377.52 is: 136,964.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,055.92 : 181,449.36 = 91,377.52 : x
  2. Step 2: Convert to fraction form
    121,055.92/181,449.36 = 91,377.52/x
  3. Step 3: Cross multiply
    121,055.92x = 181,449.36 × 91,377.52
  4. Step 4: Simplify right side
    121,055.92x = 16,580,392,522.39
  5. Step 5: Solve for x
    x = 16,580,392,522.39/121,055.92
  6. Step 6: Final answer
    x = 136,964.74

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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.