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Finding the Fourth Proportional to 103,701.67, 155,552.40 and 28,821.78

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Solution

The fourth proportional to 103,701.67, 155,552.40 and 28,821.78 is: 43,232.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,701.67 : 155,552.40 = 28,821.78 : x
  2. Step 2: Convert to fraction form
    103,701.67/155,552.40 = 28,821.78/x
  3. Step 3: Cross multiply
    103,701.67x = 155,552.40 × 28,821.78
  4. Step 4: Simplify right side
    103,701.67x = 4,483,297,051.27
  5. Step 5: Solve for x
    x = 4,483,297,051.27/103,701.67
  6. Step 6: Final answer
    x = 43,232.64

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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.