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Finding the Fourth Proportional to 57,969.68, 86,954.72 and 20,529.77

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Solution

The fourth proportional to 57,969.68, 86,954.72 and 20,529.77 is: 30,794.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,969.68 : 86,954.72 = 20,529.77 : x
  2. Step 2: Convert to fraction form
    57,969.68/86,954.72 = 20,529.77/x
  3. Step 3: Cross multiply
    57,969.68x = 86,954.72 × 20,529.77
  4. Step 4: Simplify right side
    57,969.68x = 1,785,159,864.59
  5. Step 5: Solve for x
    x = 1,785,159,864.59/57,969.68
  6. Step 6: Final answer
    x = 30,794.72

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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.