Home / 212,018.25-318,074.26-69,857.78

Finding the Fourth Proportional to 212,018.25, 318,074.26 and 69,857.78

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Solution

The fourth proportional to 212,018.25, 318,074.26 and 69,857.78 is: 104,802.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,018.25 : 318,074.26 = 69,857.78 : x
  2. Step 2: Convert to fraction form
    212,018.25/318,074.26 = 69,857.78/x
  3. Step 3: Cross multiply
    212,018.25x = 318,074.26 × 69,857.78
  4. Step 4: Simplify right side
    212,018.25x = 22,219,961,678.74
  5. Step 5: Solve for x
    x = 22,219,961,678.74/212,018.25
  6. Step 6: Final answer
    x = 104,802.12

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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.