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Finding the Fourth Proportional to 121,224.87, 181,752.80 and 53,720.15

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Solution

The fourth proportional to 121,224.87, 181,752.80 and 53,720.15 is: 80,542.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,224.87 : 181,752.80 = 53,720.15 : x
  2. Step 2: Convert to fraction form
    121,224.87/181,752.80 = 53,720.15/x
  3. Step 3: Cross multiply
    121,224.87x = 181,752.80 × 53,720.15
  4. Step 4: Simplify right side
    121,224.87x = 9,763,786,501.56
  5. Step 5: Solve for x
    x = 9,763,786,501.56/121,224.87
  6. Step 6: Final answer
    x = 80,542.77

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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.