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Finding the Fourth Proportional to 57,980.16, 86,947.97 and 20,533.32

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Solution

The fourth proportional to 57,980.16, 86,947.97 and 20,533.32 is: 30,792.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,980.16 : 86,947.97 = 20,533.32 : x
  2. Step 2: Convert to fraction form
    57,980.16/86,947.97 = 20,533.32/x
  3. Step 3: Cross multiply
    57,980.16x = 86,947.97 × 20,533.32
  4. Step 4: Simplify right side
    57,980.16x = 1,785,330,388.69
  5. Step 5: Solve for x
    x = 1,785,330,388.69/57,980.16
  6. Step 6: Final answer
    x = 30,792.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.