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Finding the Fourth Proportional to 212,112.16, 318,100.59 and 69,930.94

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Solution

The fourth proportional to 212,112.16, 318,100.59 and 69,930.94 is: 104,874.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,112.16 : 318,100.59 = 69,930.94 : x
  2. Step 2: Convert to fraction form
    212,112.16/318,100.59 = 69,930.94/x
  3. Step 3: Cross multiply
    212,112.16x = 318,100.59 × 69,930.94
  4. Step 4: Simplify right side
    212,112.16x = 22,245,073,273.25
  5. Step 5: Solve for x
    x = 22,245,073,273.25/212,112.16
  6. Step 6: Final answer
    x = 104,874.11

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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.