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Finding the Fourth Proportional to 81,158.80, 121,738.20 and 46,166.80

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Solution

The fourth proportional to 81,158.80, 121,738.20 and 46,166.80 is: 69,250.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,158.80 : 121,738.20 = 46,166.80 : x
  2. Step 2: Convert to fraction form
    81,158.80/121,738.20 = 46,166.80/x
  3. Step 3: Cross multiply
    81,158.80x = 121,738.20 × 46,166.80
  4. Step 4: Simplify right side
    81,158.80x = 5,620,263,131.76
  5. Step 5: Solve for x
    x = 5,620,263,131.76/81,158.80
  6. Step 6: Final answer
    x = 69,250.20

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Similar ratio
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1.5x scale

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.