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Finding the Fourth Proportional to 72,976.41, 100,707.40 and 39,442.41

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Solution

The fourth proportional to 72,976.41, 100,707.40 and 39,442.41 is: 54,430.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,976.41 : 100,707.40 = 39,442.41 : x
  2. Step 2: Convert to fraction form
    72,976.41/100,707.40 = 39,442.41/x
  3. Step 3: Cross multiply
    72,976.41x = 100,707.40 × 39,442.41
  4. Step 4: Simplify right side
    72,976.41x = 3,972,142,610.14
  5. Step 5: Solve for x
    x = 3,972,142,610.14/72,976.41
  6. Step 6: Final answer
    x = 54,430.50

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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.