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Finding the Fourth Proportional to 103,556.70, 155,043.45 and 100,640.70

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Solution

The fourth proportional to 103,556.70, 155,043.45 and 100,640.70 is: 150,677.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,556.70 : 155,043.45 = 100,640.70 : x
  2. Step 2: Convert to fraction form
    103,556.70/155,043.45 = 100,640.70/x
  3. Step 3: Cross multiply
    103,556.70x = 155,043.45 × 100,640.70
  4. Step 4: Simplify right side
    103,556.70x = 15,603,681,338.42
  5. Step 5: Solve for x
    x = 15,603,681,338.42/103,556.70
  6. Step 6: Final answer
    x = 150,677.66

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1.5x scale

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.