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Finding the Fourth Proportional to 212,635.44, 318,953.87 and 145,873.21

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Solution

The fourth proportional to 212,635.44, 318,953.87 and 145,873.21 is: 218,810.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,635.44 : 318,953.87 = 145,873.21 : x
  2. Step 2: Convert to fraction form
    212,635.44/318,953.87 = 145,873.21/x
  3. Step 3: Cross multiply
    212,635.44x = 318,953.87 × 145,873.21
  4. Step 4: Simplify right side
    212,635.44x = 46,526,824,858.82
  5. Step 5: Solve for x
    x = 46,526,824,858.82/212,635.44
  6. Step 6: Final answer
    x = 218,810.30

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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.