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Finding the Fourth Proportional to 64,783.98, 89,403.04 and 36,490.68

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Solution

The fourth proportional to 64,783.98, 89,403.04 and 36,490.68 is: 50,357.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,783.98 : 89,403.04 = 36,490.68 : x
  2. Step 2: Convert to fraction form
    64,783.98/89,403.04 = 36,490.68/x
  3. Step 3: Cross multiply
    64,783.98x = 89,403.04 × 36,490.68
  4. Step 4: Simplify right side
    64,783.98x = 3,262,377,723.67
  5. Step 5: Solve for x
    x = 3,262,377,723.67/64,783.98
  6. Step 6: Final answer
    x = 50,357.78

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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.