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Finding the Fourth Proportional to 121,036.80, 181,555.20 and 115,204.80

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Solution

The fourth proportional to 121,036.80, 181,555.20 and 115,204.80 is: 172,807.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,036.80 : 181,555.20 = 115,204.80 : x
  2. Step 2: Convert to fraction form
    121,036.80/181,555.20 = 115,204.80/x
  3. Step 3: Cross multiply
    121,036.80x = 181,555.20 × 115,204.80
  4. Step 4: Simplify right side
    121,036.80x = 20,916,030,504.96
  5. Step 5: Solve for x
    x = 20,916,030,504.96/121,036.80
  6. Step 6: Final answer
    x = 172,807.20

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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.