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Finding the Fourth Proportional to 212,155.56, 318,216.42 and 123,352.44

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Solution

The fourth proportional to 212,155.56, 318,216.42 and 123,352.44 is: 185,018.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,155.56 : 318,216.42 = 123,352.44 : x
  2. Step 2: Convert to fraction form
    212,155.56/318,216.42 = 123,352.44/x
  3. Step 3: Cross multiply
    212,155.56x = 318,216.42 × 123,352.44
  4. Step 4: Simplify right side
    212,155.56x = 39,252,771,855.06
  5. Step 5: Solve for x
    x = 39,252,771,855.06/212,155.56
  6. Step 6: Final answer
    x = 185,018.82

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1.5x scale

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.