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Finding the Fourth Proportional to 103,679.37, 155,500.21 and 28,780.69

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Solution

The fourth proportional to 103,679.37, 155,500.21 and 28,780.69 is: 43,165.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,679.37 : 155,500.21 = 28,780.69 : x
  2. Step 2: Convert to fraction form
    103,679.37/155,500.21 = 28,780.69/x
  3. Step 3: Cross multiply
    103,679.37x = 155,500.21 × 28,780.69
  4. Step 4: Simplify right side
    103,679.37x = 4,475,403,338.94
  5. Step 5: Solve for x
    x = 4,475,403,338.94/103,679.37
  6. Step 6: Final answer
    x = 43,165.80

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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.