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Finding the Fourth Proportional to 212,866.90, 319,207.82 and 61,030.54

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Solution

The fourth proportional to 212,866.90, 319,207.82 and 61,030.54 is: 91,519.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,866.90 : 319,207.82 = 61,030.54 : x
  2. Step 2: Convert to fraction form
    212,866.90/319,207.82 = 61,030.54/x
  3. Step 3: Cross multiply
    212,866.90x = 319,207.82 × 61,030.54
  4. Step 4: Simplify right side
    212,866.90x = 19,481,425,626.82
  5. Step 5: Solve for x
    x = 19,481,425,626.82/212,866.90
  6. Step 6: Final answer
    x = 91,519.28

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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.