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Finding the Fourth Proportional to 64,579.53, 89,120.81 and 35,509.13

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Solution

The fourth proportional to 64,579.53, 89,120.81 and 35,509.13 is: 49,003.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,579.53 : 89,120.81 = 35,509.13 : x
  2. Step 2: Convert to fraction form
    64,579.53/89,120.81 = 35,509.13/x
  3. Step 3: Cross multiply
    64,579.53x = 89,120.81 × 35,509.13
  4. Step 4: Simplify right side
    64,579.53x = 3,164,601,804.85
  5. Step 5: Solve for x
    x = 3,164,601,804.85/64,579.53
  6. Step 6: Final answer
    x = 49,003.17

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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.