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Finding the Fourth Proportional to 212,530.40, 318,104.40 and 165,528.80

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Solution

The fourth proportional to 212,530.40, 318,104.40 and 165,528.80 is: 247,754.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,530.40 : 318,104.40 = 165,528.80 : x
  2. Step 2: Convert to fraction form
    212,530.40/318,104.40 = 165,528.80/x
  3. Step 3: Cross multiply
    212,530.40x = 318,104.40 × 165,528.80
  4. Step 4: Simplify right side
    212,530.40x = 52,655,439,606.72
  5. Step 5: Solve for x
    x = 52,655,439,606.72/212,530.40
  6. Step 6: Final answer
    x = 247,754.86

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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.