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Finding the Fourth Proportional to 64,799.64, 89,424.54 and 36,121.68

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Solution

The fourth proportional to 64,799.64, 89,424.54 and 36,121.68 is: 49,848.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,799.64 : 89,424.54 = 36,121.68 : x
  2. Step 2: Convert to fraction form
    64,799.64/89,424.54 = 36,121.68/x
  3. Step 3: Cross multiply
    64,799.64x = 89,424.54 × 36,121.68
  4. Step 4: Simplify right side
    64,799.64x = 3,230,164,618.03
  5. Step 5: Solve for x
    x = 3,230,164,618.03/64,799.64
  6. Step 6: Final answer
    x = 49,848.50

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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.