Home / 80,810.87-121,205.36-21,647.05

Finding the Fourth Proportional to 80,810.87, 121,205.36 and 21,647.05

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Solution

The fourth proportional to 80,810.87, 121,205.36 and 21,647.05 is: 32,467.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,810.87 : 121,205.36 = 21,647.05 : x
  2. Step 2: Convert to fraction form
    80,810.87/121,205.36 = 21,647.05/x
  3. Step 3: Cross multiply
    80,810.87x = 121,205.36 × 21,647.05
  4. Step 4: Simplify right side
    80,810.87x = 2,623,738,239.29
  5. Step 5: Solve for x
    x = 2,623,738,239.29/80,810.87
  6. Step 6: Final answer
    x = 32,467.64

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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.