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Finding the Fourth Proportional to 212,439.48, 318,675.60 and 54,669.48

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Solution

The fourth proportional to 212,439.48, 318,675.60 and 54,669.48 is: 82,008.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,439.48 : 318,675.60 = 54,669.48 : x
  2. Step 2: Convert to fraction form
    212,439.48/318,675.60 = 54,669.48/x
  3. Step 3: Cross multiply
    212,439.48x = 318,675.60 × 54,669.48
  4. Step 4: Simplify right side
    212,439.48x = 17,421,829,340.69
  5. Step 5: Solve for x
    x = 17,421,829,340.69/212,439.48
  6. Step 6: Final answer
    x = 82,008.44

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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.