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Finding the Fourth Proportional to 213,782.87, 320,729.63 and 80,664.27

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Solution

The fourth proportional to 213,782.87, 320,729.63 and 80,664.27 is: 121,017.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,782.87 : 320,729.63 = 80,664.27 : x
  2. Step 2: Convert to fraction form
    213,782.87/320,729.63 = 80,664.27/x
  3. Step 3: Cross multiply
    213,782.87x = 320,729.63 × 80,664.27
  4. Step 4: Simplify right side
    213,782.87x = 25,871,421,068.00
  5. Step 5: Solve for x
    x = 25,871,421,068.00/213,782.87
  6. Step 6: Final answer
    x = 121,017.28

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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.