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Finding the Fourth Proportional to 64,978.13, 89,669.84 and 36,685.64

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Solution

The fourth proportional to 64,978.13, 89,669.84 and 36,685.64 is: 50,626.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,978.13 : 89,669.84 = 36,685.64 : x
  2. Step 2: Convert to fraction form
    64,978.13/89,669.84 = 36,685.64/x
  3. Step 3: Cross multiply
    64,978.13x = 89,669.84 × 36,685.64
  4. Step 4: Simplify right side
    64,978.13x = 3,289,594,837.32
  5. Step 5: Solve for x
    x = 3,289,594,837.32/64,978.13
  6. Step 6: Final answer
    x = 50,626.19

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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.