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Finding the Fourth Proportional to 64,688.60, 89,263.92 and 36,393.68

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Solution

The fourth proportional to 64,688.60, 89,263.92 and 36,393.68 is: 50,219.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,688.60 : 89,263.92 = 36,393.68 : x
  2. Step 2: Convert to fraction form
    64,688.60/89,263.92 = 36,393.68/x
  3. Step 3: Cross multiply
    64,688.60x = 89,263.92 × 36,393.68
  4. Step 4: Simplify right side
    64,688.60x = 3,248,642,540.03
  5. Step 5: Solve for x
    x = 3,248,642,540.03/64,688.60
  6. Step 6: Final answer
    x = 50,219.71

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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.