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Finding the Fourth Proportional to 212,478.35, 318,643.25 and 62,678.88

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Solution

The fourth proportional to 212,478.35, 318,643.25 and 62,678.88 is: 93,996.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,478.35 : 318,643.25 = 62,678.88 : x
  2. Step 2: Convert to fraction form
    212,478.35/318,643.25 = 62,678.88/x
  3. Step 3: Cross multiply
    212,478.35x = 318,643.25 × 62,678.88
  4. Step 4: Simplify right side
    212,478.35x = 19,972,201,716.17
  5. Step 5: Solve for x
    x = 19,972,201,716.17/212,478.35
  6. Step 6: Final answer
    x = 93,996.41

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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.