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Finding the Fourth Proportional to 73,298.86, 109,950.18 and 19,991.28

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Solution

The fourth proportional to 73,298.86, 109,950.18 and 19,991.28 is: 29,987.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,298.86 : 109,950.18 = 19,991.28 : x
  2. Step 2: Convert to fraction form
    73,298.86/109,950.18 = 19,991.28/x
  3. Step 3: Cross multiply
    73,298.86x = 109,950.18 × 19,991.28
  4. Step 4: Simplify right side
    73,298.86x = 2,198,044,284.68
  5. Step 5: Solve for x
    x = 2,198,044,284.68/73,298.86
  6. Step 6: Final answer
    x = 29,987.43

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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.