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Finding the Fourth Proportional to 70,396.36, 105,586.32 and 28,274.74

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Solution

The fourth proportional to 70,396.36, 105,586.32 and 28,274.74 is: 42,408.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,396.36 : 105,586.32 = 28,274.74 : x
  2. Step 2: Convert to fraction form
    70,396.36/105,586.32 = 28,274.74/x
  3. Step 3: Cross multiply
    70,396.36x = 105,586.32 × 28,274.74
  4. Step 4: Simplify right side
    70,396.36x = 2,985,425,587.62
  5. Step 5: Solve for x
    x = 2,985,425,587.62/70,396.36
  6. Step 6: Final answer
    x = 42,408.81

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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.