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Finding the Fourth Proportional to 70,408.45, 105,611.52 and 17,100.87

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Solution

The fourth proportional to 70,408.45, 105,611.52 and 17,100.87 is: 25,651.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,408.45 : 105,611.52 = 17,100.87 : x
  2. Step 2: Convert to fraction form
    70,408.45/105,611.52 = 17,100.87/x
  3. Step 3: Cross multiply
    70,408.45x = 105,611.52 × 17,100.87
  4. Step 4: Simplify right side
    70,408.45x = 1,806,048,445.92
  5. Step 5: Solve for x
    x = 1,806,048,445.92/70,408.45
  6. Step 6: Final answer
    x = 25,651.02

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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.