Home / 212,017.25-318,072.76-69,856.78

Finding the Fourth Proportional to 212,017.25, 318,072.76 and 69,856.78

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Solution

The fourth proportional to 212,017.25, 318,072.76 and 69,856.78 is: 104,800.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,017.25 : 318,072.76 = 69,856.78 : x
  2. Step 2: Convert to fraction form
    212,017.25/318,072.76 = 69,856.78/x
  3. Step 3: Cross multiply
    212,017.25x = 318,072.76 × 69,856.78
  4. Step 4: Simplify right side
    212,017.25x = 22,219,538,445.88
  5. Step 5: Solve for x
    x = 22,219,538,445.88/212,017.25
  6. Step 6: Final answer
    x = 104,800.62

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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.