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Finding the Fourth Proportional to 292,728, 439,093.08 and 71,112

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Solution

The fourth proportional to 292,728, 439,093.08 and 71,112 is: 106,668.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,728 : 439,093.08 = 71,112 : x
  2. Step 2: Convert to fraction form
    292,728/439,093.08 = 71,112/x
  3. Step 3: Cross multiply
    292,728x = 439,093.08 × 71,112
  4. Step 4: Simplify right side
    292,728x = 31,224,787,104.96
  5. Step 5: Solve for x
    x = 31,224,787,104.96/292,728
  6. Step 6: Final answer
    x = 106,668.26

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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.