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Finding the Fourth Proportional to 60,561.99, 90,843.39 and 21,119.09

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Solution

The fourth proportional to 60,561.99, 90,843.39 and 21,119.09 is: 31,678.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,561.99 : 90,843.39 = 21,119.09 : x
  2. Step 2: Convert to fraction form
    60,561.99/90,843.39 = 21,119.09/x
  3. Step 3: Cross multiply
    60,561.99x = 90,843.39 × 21,119.09
  4. Step 4: Simplify right side
    60,561.99x = 1,918,529,275.10
  5. Step 5: Solve for x
    x = 1,918,529,275.10/60,561.99
  6. Step 6: Final answer
    x = 31,678.77

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1.5x scale

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.