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Finding the Fourth Proportional to 72,976.27, 100,707.21 and 39,442.27

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Solution

The fourth proportional to 72,976.27, 100,707.21 and 39,442.27 is: 54,430.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,976.27 : 100,707.21 = 39,442.27 : x
  2. Step 2: Convert to fraction form
    72,976.27/100,707.21 = 39,442.27/x
  3. Step 3: Cross multiply
    72,976.27x = 100,707.21 × 39,442.27
  4. Step 4: Simplify right side
    72,976.27x = 3,972,120,756.92
  5. Step 5: Solve for x
    x = 3,972,120,756.92/72,976.27
  6. Step 6: Final answer
    x = 54,430.31

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1.5x scale

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.