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Finding the Fourth Proportional to 72,970.92, 100,698 and 41,139.54

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Solution

The fourth proportional to 72,970.92, 100,698 and 41,139.54 is: 56,771.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,970.92 : 100,698 = 41,139.54 : x
  2. Step 2: Convert to fraction form
    72,970.92/100,698 = 41,139.54/x
  3. Step 3: Cross multiply
    72,970.92x = 100,698 × 41,139.54
  4. Step 4: Simplify right side
    72,970.92x = 4,142,669,398.92
  5. Step 5: Solve for x
    x = 4,142,669,398.92/72,970.92
  6. Step 6: Final answer
    x = 56,771.51

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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.