Home / 212,385.78-318,634.02-79,267.14

Finding the Fourth Proportional to 212,385.78, 318,634.02 and 79,267.14

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Solution

The fourth proportional to 212,385.78, 318,634.02 and 79,267.14 is: 118,921.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,385.78 : 318,634.02 = 79,267.14 : x
  2. Step 2: Convert to fraction form
    212,385.78/318,634.02 = 79,267.14/x
  3. Step 3: Cross multiply
    212,385.78x = 318,634.02 × 79,267.14
  4. Step 4: Simplify right side
    212,385.78x = 25,257,207,472.10
  5. Step 5: Solve for x
    x = 25,257,207,472.10/212,385.78
  6. Step 6: Final answer
    x = 118,921.37

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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.