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Finding the Fourth Proportional to 45,039, 62,168.40 and 28,272

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Solution

The fourth proportional to 45,039, 62,168.40 and 28,272 is: 39,024.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,039 : 62,168.40 = 28,272 : x
  2. Step 2: Convert to fraction form
    45,039/62,168.40 = 28,272/x
  3. Step 3: Cross multiply
    45,039x = 62,168.40 × 28,272
  4. Step 4: Simplify right side
    45,039x = 1,757,625,004.80
  5. Step 5: Solve for x
    x = 1,757,625,004.80/45,039
  6. Step 6: Final answer
    x = 39,024.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.