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Finding the Fourth Proportional to 103,611.77, 155,402.23 and 28,724.10

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Solution

The fourth proportional to 103,611.77, 155,402.23 and 28,724.10 is: 43,081.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,611.77 : 155,402.23 = 28,724.10 : x
  2. Step 2: Convert to fraction form
    103,611.77/155,402.23 = 28,724.10/x
  3. Step 3: Cross multiply
    103,611.77x = 155,402.23 × 28,724.10
  4. Step 4: Simplify right side
    103,611.77x = 4,463,789,194.74
  5. Step 5: Solve for x
    x = 4,463,789,194.74/103,611.77
  6. Step 6: Final answer
    x = 43,081.87

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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.