Home / 121,021.04-181,329.66-85,423.97

Finding the Fourth Proportional to 121,021.04, 181,329.66 and 85,423.97

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Solution

The fourth proportional to 121,021.04, 181,329.66 and 85,423.97 is: 127,993.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,021.04 : 181,329.66 = 85,423.97 : x
  2. Step 2: Convert to fraction form
    121,021.04/181,329.66 = 85,423.97/x
  3. Step 3: Cross multiply
    121,021.04x = 181,329.66 × 85,423.97
  4. Step 4: Simplify right side
    121,021.04x = 15,489,898,529.30
  5. Step 5: Solve for x
    x = 15,489,898,529.30/121,021.04
  6. Step 6: Final answer
    x = 127,993.44

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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.