Home / 80,891.03-120,703.73-72,485.45

Finding the Fourth Proportional to 80,891.03, 120,703.73 and 72,485.45

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Solution

The fourth proportional to 80,891.03, 120,703.73 and 72,485.45 is: 108,161.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,891.03 : 120,703.73 = 72,485.45 : x
  2. Step 2: Convert to fraction form
    80,891.03/120,703.73 = 72,485.45/x
  3. Step 3: Cross multiply
    80,891.03x = 120,703.73 × 72,485.45
  4. Step 4: Simplify right side
    80,891.03x = 8,749,263,219.78
  5. Step 5: Solve for x
    x = 8,749,263,219.78/80,891.03
  6. Step 6: Final answer
    x = 108,161.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.