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Finding the Fourth Proportional to 103,611.17, 155,401.29 and 28,723.50

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Solution

The fourth proportional to 103,611.17, 155,401.29 and 28,723.50 is: 43,080.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,611.17 : 155,401.29 = 28,723.50 : x
  2. Step 2: Convert to fraction form
    103,611.17/155,401.29 = 28,723.50/x
  3. Step 3: Cross multiply
    103,611.17x = 155,401.29 × 28,723.50
  4. Step 4: Simplify right side
    103,611.17x = 4,463,668,953.32
  5. Step 5: Solve for x
    x = 4,463,668,953.32/103,611.17
  6. Step 6: Final answer
    x = 43,080.96

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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.