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Finding the Fourth Proportional to 121,015.20, 181,177.20 and 117,559.20

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Solution

The fourth proportional to 121,015.20, 181,177.20 and 117,559.20 is: 176,003.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,015.20 : 181,177.20 = 117,559.20 : x
  2. Step 2: Convert to fraction form
    121,015.20/181,177.20 = 117,559.20/x
  3. Step 3: Cross multiply
    121,015.20x = 181,177.20 × 117,559.20
  4. Step 4: Simplify right side
    121,015.20x = 21,299,046,690.24
  5. Step 5: Solve for x
    x = 21,299,046,690.24/121,015.20
  6. Step 6: Final answer
    x = 176,003.07

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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.