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Finding the Fourth Proportional to 70,021.29, 104,991.62 and 30,559.53

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Solution

The fourth proportional to 70,021.29, 104,991.62 and 30,559.53 is: 45,821.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,021.29 : 104,991.62 = 30,559.53 : x
  2. Step 2: Convert to fraction form
    70,021.29/104,991.62 = 30,559.53/x
  3. Step 3: Cross multiply
    70,021.29x = 104,991.62 × 30,559.53
  4. Step 4: Simplify right side
    70,021.29x = 3,208,494,408.34
  5. Step 5: Solve for x
    x = 3,208,494,408.34/70,021.29
  6. Step 6: Final answer
    x = 45,821.70

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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.