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Finding the Fourth Proportional to 103,290.47, 154,936.39 and 28,418.53

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Solution

The fourth proportional to 103,290.47, 154,936.39 and 28,418.53 is: 42,627.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,290.47 : 154,936.39 = 28,418.53 : x
  2. Step 2: Convert to fraction form
    103,290.47/154,936.39 = 28,418.53/x
  3. Step 3: Cross multiply
    103,290.47x = 154,936.39 × 28,418.53
  4. Step 4: Simplify right side
    103,290.47x = 4,403,063,530.53
  5. Step 5: Solve for x
    x = 4,403,063,530.53/103,290.47
  6. Step 6: Final answer
    x = 42,627.97

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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.