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Finding the Fourth Proportional to 103,537.60, 155,309.90 and 28,651.52

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Solution

The fourth proportional to 103,537.60, 155,309.90 and 28,651.52 is: 42,978.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,537.60 : 155,309.90 = 28,651.52 : x
  2. Step 2: Convert to fraction form
    103,537.60/155,309.90 = 28,651.52/x
  3. Step 3: Cross multiply
    103,537.60x = 155,309.90 × 28,651.52
  4. Step 4: Simplify right side
    103,537.60x = 4,449,864,706.05
  5. Step 5: Solve for x
    x = 4,449,864,706.05/103,537.60
  6. Step 6: Final answer
    x = 42,978.25

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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.