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Finding the Fourth Proportional to 72,619.29, 100,203.75 and 40,782.06

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Solution

The fourth proportional to 72,619.29, 100,203.75 and 40,782.06 is: 56,273.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,619.29 : 100,203.75 = 40,782.06 : x
  2. Step 2: Convert to fraction form
    72,619.29/100,203.75 = 40,782.06/x
  3. Step 3: Cross multiply
    72,619.29x = 100,203.75 × 40,782.06
  4. Step 4: Simplify right side
    72,619.29x = 4,086,515,344.73
  5. Step 5: Solve for x
    x = 4,086,515,344.73/72,619.29
  6. Step 6: Final answer
    x = 56,273.14

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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.