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Finding the Fourth Proportional to 69,037.80, 103,556.70 and 61,820.70

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Solution

The fourth proportional to 69,037.80, 103,556.70 and 61,820.70 is: 92,731.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,037.80 : 103,556.70 = 61,820.70 : x
  2. Step 2: Convert to fraction form
    69,037.80/103,556.70 = 61,820.70/x
  3. Step 3: Cross multiply
    69,037.80x = 103,556.70 × 61,820.70
  4. Step 4: Simplify right side
    69,037.80x = 6,401,947,683.69
  5. Step 5: Solve for x
    x = 6,401,947,683.69/69,037.80
  6. Step 6: Final answer
    x = 92,731.05

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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.