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Finding the Fourth Proportional to 380,722.81, 571,119.49 and 124,556.80

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Solution

The fourth proportional to 380,722.81, 571,119.49 and 124,556.80 is: 186,846.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,722.81 : 571,119.49 = 124,556.80 : x
  2. Step 2: Convert to fraction form
    380,722.81/571,119.49 = 124,556.80/x
  3. Step 3: Cross multiply
    380,722.81x = 571,119.49 × 124,556.80
  4. Step 4: Simplify right side
    380,722.81x = 71,136,816,092.03
  5. Step 5: Solve for x
    x = 71,136,816,092.03/380,722.81
  6. Step 6: Final answer
    x = 186,846.74

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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.