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Finding the Fourth Proportional to 212,478.78, 318,643.90 and 62,679.32

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Solution

The fourth proportional to 212,478.78, 318,643.90 and 62,679.32 is: 93,997.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,478.78 : 318,643.90 = 62,679.32 : x
  2. Step 2: Convert to fraction form
    212,478.78/318,643.90 = 62,679.32/x
  3. Step 3: Cross multiply
    212,478.78x = 318,643.90 × 62,679.32
  4. Step 4: Simplify right side
    212,478.78x = 19,972,382,974.15
  5. Step 5: Solve for x
    x = 19,972,382,974.15/212,478.78
  6. Step 6: Final answer
    x = 93,997.07

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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.