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Finding the Fourth Proportional to 103,658.62, 155,491.17 and 28,779.52

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Solution

The fourth proportional to 103,658.62, 155,491.17 and 28,779.52 is: 43,170.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,658.62 : 155,491.17 = 28,779.52 : x
  2. Step 2: Convert to fraction form
    103,658.62/155,491.17 = 28,779.52/x
  3. Step 3: Cross multiply
    103,658.62x = 155,491.17 × 28,779.52
  4. Step 4: Simplify right side
    103,658.62x = 4,474,961,236.84
  5. Step 5: Solve for x
    x = 4,474,961,236.84/103,658.62
  6. Step 6: Final answer
    x = 43,170.18

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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.