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Finding the Fourth Proportional to 72,548.99, 100,112.72 and 40,281.94

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Solution

The fourth proportional to 72,548.99, 100,112.72 and 40,281.94 is: 55,586.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,548.99 : 100,112.72 = 40,281.94 : x
  2. Step 2: Convert to fraction form
    72,548.99/100,112.72 = 40,281.94/x
  3. Step 3: Cross multiply
    72,548.99x = 100,112.72 × 40,281.94
  4. Step 4: Simplify right side
    72,548.99x = 4,032,734,655.07
  5. Step 5: Solve for x
    x = 4,032,734,655.07/72,548.99
  6. Step 6: Final answer
    x = 55,586.37

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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.