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Finding the Fourth Proportional to 121,940.91, 183,001.21 and 57,899.32

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Solution

The fourth proportional to 121,940.91, 183,001.21 and 57,899.32 is: 86,891.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,940.91 : 183,001.21 = 57,899.32 : x
  2. Step 2: Convert to fraction form
    121,940.91/183,001.21 = 57,899.32/x
  3. Step 3: Cross multiply
    121,940.91x = 183,001.21 × 57,899.32
  4. Step 4: Simplify right side
    121,940.91x = 10,595,645,015.93
  5. Step 5: Solve for x
    x = 10,595,645,015.93/121,940.91
  6. Step 6: Final answer
    x = 86,891.63

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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.