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Finding the Fourth Proportional to 212,578.77, 318,886.52 and 54,805.89

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Solution

The fourth proportional to 212,578.77, 318,886.52 and 54,805.89 is: 82,213.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,578.77 : 318,886.52 = 54,805.89 : x
  2. Step 2: Convert to fraction form
    212,578.77/318,886.52 = 54,805.89/x
  3. Step 3: Cross multiply
    212,578.77x = 318,886.52 × 54,805.89
  4. Step 4: Simplify right side
    212,578.77x = 17,476,859,537.60
  5. Step 5: Solve for x
    x = 17,476,859,537.60/212,578.77
  6. Step 6: Final answer
    x = 82,213.57

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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.