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Finding the Fourth Proportional to 64,664.64, 89,260.80 and 40,806.84

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Solution

The fourth proportional to 64,664.64, 89,260.80 and 40,806.84 is: 56,328.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,664.64 : 89,260.80 = 40,806.84 : x
  2. Step 2: Convert to fraction form
    64,664.64/89,260.80 = 40,806.84/x
  3. Step 3: Cross multiply
    64,664.64x = 89,260.80 × 40,806.84
  4. Step 4: Simplify right side
    64,664.64x = 3,642,451,183.87
  5. Step 5: Solve for x
    x = 3,642,451,183.87/64,664.64
  6. Step 6: Final answer
    x = 56,328.33

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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.