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Finding the Fourth Proportional to 121,212.80, 181,819.20 and 110,715.20

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Solution

The fourth proportional to 121,212.80, 181,819.20 and 110,715.20 is: 166,072.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,212.80 : 181,819.20 = 110,715.20 : x
  2. Step 2: Convert to fraction form
    121,212.80/181,819.20 = 110,715.20/x
  3. Step 3: Cross multiply
    121,212.80x = 181,819.20 × 110,715.20
  4. Step 4: Simplify right side
    121,212.80x = 20,130,149,091.84
  5. Step 5: Solve for x
    x = 20,130,149,091.84/121,212.80
  6. Step 6: Final answer
    x = 166,072.80

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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.