Home / 80,803.90-121,205.85-21,638.05

Finding the Fourth Proportional to 80,803.90, 121,205.85 and 21,638.05

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Solution

The fourth proportional to 80,803.90, 121,205.85 and 21,638.05 is: 32,457.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,803.90 : 121,205.85 = 21,638.05 : x
  2. Step 2: Convert to fraction form
    80,803.90/121,205.85 = 21,638.05/x
  3. Step 3: Cross multiply
    80,803.90x = 121,205.85 × 21,638.05
  4. Step 4: Simplify right side
    80,803.90x = 2,622,658,242.59
  5. Step 5: Solve for x
    x = 2,622,658,242.59/80,803.90
  6. Step 6: Final answer
    x = 32,457.08

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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.