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Finding the Fourth Proportional to 73,090.69, 100,865.15 and 39,556.69

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Solution

The fourth proportional to 73,090.69, 100,865.15 and 39,556.69 is: 54,588.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,090.69 : 100,865.15 = 39,556.69 : x
  2. Step 2: Convert to fraction form
    73,090.69/100,865.15 = 39,556.69/x
  3. Step 3: Cross multiply
    73,090.69x = 100,865.15 × 39,556.69
  4. Step 4: Simplify right side
    73,090.69x = 3,989,891,168.74
  5. Step 5: Solve for x
    x = 3,989,891,168.74/73,090.69
  6. Step 6: Final answer
    x = 54,588.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.