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Finding the Fourth Proportional to 72,945.93, 100,699.00 and 51,453.19

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Solution

The fourth proportional to 72,945.93, 100,699.00 and 51,453.19 is: 71,029.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,945.93 : 100,699.00 = 51,453.19 : x
  2. Step 2: Convert to fraction form
    72,945.93/100,699.00 = 51,453.19/x
  3. Step 3: Cross multiply
    72,945.93x = 100,699.00 × 51,453.19
  4. Step 4: Simplify right side
    72,945.93x = 5,181,284,019.05
  5. Step 5: Solve for x
    x = 5,181,284,019.05/72,945.93
  6. Step 6: Final answer
    x = 71,029.10

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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.