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Finding the Fourth Proportional to 72,740.49, 100,324.88 and 49,783.89

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Solution

The fourth proportional to 72,740.49, 100,324.88 and 49,783.89 is: 68,662.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,740.49 : 100,324.88 = 49,783.89 : x
  2. Step 2: Convert to fraction form
    72,740.49/100,324.88 = 49,783.89/x
  3. Step 3: Cross multiply
    72,740.49x = 100,324.88 × 49,783.89
  4. Step 4: Simplify right side
    72,740.49x = 4,994,562,790.18
  5. Step 5: Solve for x
    x = 4,994,562,790.18/72,740.49
  6. Step 6: Final answer
    x = 68,662.76

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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.