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Finding the Fourth Proportional to 44,405, 66,640.38 and 21,031.51

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Solution

The fourth proportional to 44,405, 66,640.38 and 21,031.51 is: 31,562.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    44,405 : 66,640.38 = 21,031.51 : x
  2. Step 2: Convert to fraction form
    44,405/66,640.38 = 21,031.51/x
  3. Step 3: Cross multiply
    44,405x = 66,640.38 × 21,031.51
  4. Step 4: Simplify right side
    44,405x = 1,401,547,380.01
  5. Step 5: Solve for x
    x = 1,401,547,380.01/44,405
  6. Step 6: Final answer
    x = 31,562.83

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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.