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Finding the Fourth Proportional to 64,991.64, 89,688.44 and 36,699.16

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Solution

The fourth proportional to 64,991.64, 89,688.44 and 36,699.16 is: 50,644.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,991.64 : 89,688.44 = 36,699.16 : x
  2. Step 2: Convert to fraction form
    64,991.64/89,688.44 = 36,699.16/x
  3. Step 3: Cross multiply
    64,991.64x = 89,688.44 × 36,699.16
  4. Step 4: Simplify right side
    64,991.64x = 3,291,490,409.71
  5. Step 5: Solve for x
    x = 3,291,490,409.71/64,991.64
  6. Step 6: Final answer
    x = 50,644.83

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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.