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Finding the Fourth Proportional to 212,572.21, 318,903.30 and 70,409.44

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Solution

The fourth proportional to 212,572.21, 318,903.30 and 70,409.44 is: 105,629.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,572.21 : 318,903.30 = 70,409.44 : x
  2. Step 2: Convert to fraction form
    212,572.21/318,903.30 = 70,409.44/x
  3. Step 3: Cross multiply
    212,572.21x = 318,903.30 × 70,409.44
  4. Step 4: Simplify right side
    212,572.21x = 22,453,802,692.57
  5. Step 5: Solve for x
    x = 22,453,802,692.57/212,572.21
  6. Step 6: Final answer
    x = 105,629.06

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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.