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Finding the Fourth Proportional to 69,455, 104,200.14 and 20,207

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Solution

The fourth proportional to 69,455, 104,200.14 and 20,207 is: 30,315.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,455 : 104,200.14 = 20,207 : x
  2. Step 2: Convert to fraction form
    69,455/104,200.14 = 20,207/x
  3. Step 3: Cross multiply
    69,455x = 104,200.14 × 20,207
  4. Step 4: Simplify right side
    69,455x = 2,105,572,228.98
  5. Step 5: Solve for x
    x = 2,105,572,228.98/69,455
  6. Step 6: Final answer
    x = 30,315.63

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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.