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Finding the Fourth Proportional to 72,522.68, 108,709.19 and 30,427.21

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Solution

The fourth proportional to 72,522.68, 108,709.19 and 30,427.21 is: 45,609.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,522.68 : 108,709.19 = 30,427.21 : x
  2. Step 2: Convert to fraction form
    72,522.68/108,709.19 = 30,427.21/x
  3. Step 3: Cross multiply
    72,522.68x = 108,709.19 × 30,427.21
  4. Step 4: Simplify right side
    72,522.68x = 3,307,716,929.15
  5. Step 5: Solve for x
    x = 3,307,716,929.15/72,522.68
  6. Step 6: Final answer
    x = 45,609.41

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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.