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Finding the Fourth Proportional to 103,458.90, 155,188.11 and 28,578.85

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Solution

The fourth proportional to 103,458.90, 155,188.11 and 28,578.85 is: 42,868.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,458.90 : 155,188.11 = 28,578.85 : x
  2. Step 2: Convert to fraction form
    103,458.90/155,188.11 = 28,578.85/x
  3. Step 3: Cross multiply
    103,458.90x = 155,188.11 × 28,578.85
  4. Step 4: Simplify right side
    103,458.90x = 4,435,097,717.47
  5. Step 5: Solve for x
    x = 4,435,097,717.47/103,458.90
  6. Step 6: Final answer
    x = 42,868.21

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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.