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Finding the Fourth Proportional to 212,596.63, 318,944.15 and 72,355.25

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Solution

The fourth proportional to 212,596.63, 318,944.15 and 72,355.25 is: 108,549.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,596.63 : 318,944.15 = 72,355.25 : x
  2. Step 2: Convert to fraction form
    212,596.63/318,944.15 = 72,355.25/x
  3. Step 3: Cross multiply
    212,596.63x = 318,944.15 × 72,355.25
  4. Step 4: Simplify right side
    212,596.63x = 23,077,283,709.29
  5. Step 5: Solve for x
    x = 23,077,283,709.29/212,596.63
  6. Step 6: Final answer
    x = 108,549.62

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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.