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Finding the Fourth Proportional to 91,720, 126,573.60 and 54,017.44

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Solution

The fourth proportional to 91,720, 126,573.60 and 54,017.44 is: 74,544.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,720 : 126,573.60 = 54,017.44 : x
  2. Step 2: Convert to fraction form
    91,720/126,573.60 = 54,017.44/x
  3. Step 3: Cross multiply
    91,720x = 126,573.60 × 54,017.44
  4. Step 4: Simplify right side
    91,720x = 6,837,181,843.58
  5. Step 5: Solve for x
    x = 6,837,181,843.58/91,720
  6. Step 6: Final answer
    x = 74,544.07

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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.