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Finding the Fourth Proportional to 72,674.37, 100,339.56 and 64,993.78

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Solution

The fourth proportional to 72,674.37, 100,339.56 and 64,993.78 is: 89,735.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,674.37 : 100,339.56 = 64,993.78 : x
  2. Step 2: Convert to fraction form
    72,674.37/100,339.56 = 64,993.78/x
  3. Step 3: Cross multiply
    72,674.37x = 100,339.56 × 64,993.78
  4. Step 4: Simplify right side
    72,674.37x = 6,521,447,287.94
  5. Step 5: Solve for x
    x = 6,521,447,287.94/72,674.37
  6. Step 6: Final answer
    x = 89,735.17

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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.