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Finding the Fourth Proportional to 61,356, 91,979.04 and 21,907.44

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Solution

The fourth proportional to 61,356, 91,979.04 and 21,907.44 is: 32,841.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,356 : 91,979.04 = 21,907.44 : x
  2. Step 2: Convert to fraction form
    61,356/91,979.04 = 21,907.44/x
  3. Step 3: Cross multiply
    61,356x = 91,979.04 × 21,907.44
  4. Step 4: Simplify right side
    61,356x = 2,015,025,300.06
  5. Step 5: Solve for x
    x = 2,015,025,300.06/61,356
  6. Step 6: Final answer
    x = 32,841.54

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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.