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Finding the Fourth Proportional to 103,616.35, 155,409.07 and 28,728.68

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Solution

The fourth proportional to 103,616.35, 155,409.07 and 28,728.68 is: 43,088.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,616.35 : 155,409.07 = 28,728.68 : x
  2. Step 2: Convert to fraction form
    103,616.35/155,409.07 = 28,728.68/x
  3. Step 3: Cross multiply
    103,616.35x = 155,409.07 × 28,728.68
  4. Step 4: Simplify right side
    103,616.35x = 4,464,697,441.13
  5. Step 5: Solve for x
    x = 4,464,697,441.13/103,616.35
  6. Step 6: Final answer
    x = 43,088.73

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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.