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Finding the Fourth Proportional to 73,969.76, 110,950.32 and 21,378.08

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Solution

The fourth proportional to 73,969.76, 110,950.32 and 21,378.08 is: 32,065.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,969.76 : 110,950.32 = 21,378.08 : x
  2. Step 2: Convert to fraction form
    73,969.76/110,950.32 = 21,378.08/x
  3. Step 3: Cross multiply
    73,969.76x = 110,950.32 × 21,378.08
  4. Step 4: Simplify right side
    73,969.76x = 2,371,904,816.99
  5. Step 5: Solve for x
    x = 2,371,904,816.99/73,969.76
  6. Step 6: Final answer
    x = 32,065.87

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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.