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Finding the Fourth Proportional to 103,636.53, 155,454.78 and 28,756.68

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Solution

The fourth proportional to 103,636.53, 155,454.78 and 28,756.68 is: 43,135.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,636.53 : 155,454.78 = 28,756.68 : x
  2. Step 2: Convert to fraction form
    103,636.53/155,454.78 = 28,756.68/x
  3. Step 3: Cross multiply
    103,636.53x = 155,454.78 × 28,756.68
  4. Step 4: Simplify right side
    103,636.53x = 4,470,363,362.93
  5. Step 5: Solve for x
    x = 4,470,363,362.93/103,636.53
  6. Step 6: Final answer
    x = 43,135.02

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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.