Home / 72,981.10-109,459.14-20,378.44

Finding the Fourth Proportional to 72,981.10, 109,459.14 and 20,378.44

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Solution

The fourth proportional to 72,981.10, 109,459.14 and 20,378.44 is: 30,564.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,981.10 : 109,459.14 = 20,378.44 : x
  2. Step 2: Convert to fraction form
    72,981.10/109,459.14 = 20,378.44/x
  3. Step 3: Cross multiply
    72,981.10x = 109,459.14 × 20,378.44
  4. Step 4: Simplify right side
    72,981.10x = 2,230,606,516.94
  5. Step 5: Solve for x
    x = 2,230,606,516.94/72,981.10
  6. Step 6: Final answer
    x = 30,564.17

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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.