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Finding the Fourth Proportional to 61,308.42, 91,929.28 and 19,170.33

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Solution

The fourth proportional to 61,308.42, 91,929.28 and 19,170.33 is: 28,745.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,308.42 : 91,929.28 = 19,170.33 : x
  2. Step 2: Convert to fraction form
    61,308.42/91,929.28 = 19,170.33/x
  3. Step 3: Cross multiply
    61,308.42x = 91,929.28 × 19,170.33
  4. Step 4: Simplify right side
    61,308.42x = 1,762,314,634.26
  5. Step 5: Solve for x
    x = 1,762,314,634.26/61,308.42
  6. Step 6: Final answer
    x = 28,745.07

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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.