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Finding the Fourth Proportional to 74,882.91, 112,322.21 and 19,478.91

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Solution

The fourth proportional to 74,882.91, 112,322.21 and 19,478.91 is: 29,217.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,882.91 : 112,322.21 = 19,478.91 : x
  2. Step 2: Convert to fraction form
    74,882.91/112,322.21 = 19,478.91/x
  3. Step 3: Cross multiply
    74,882.91x = 112,322.21 × 19,478.91
  4. Step 4: Simplify right side
    74,882.91x = 2,187,914,122.20
  5. Step 5: Solve for x
    x = 2,187,914,122.20/74,882.91
  6. Step 6: Final answer
    x = 29,217.80

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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.