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Finding the Fourth Proportional to 80,762.22, 111,080.96 and 64,811.70

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Solution

The fourth proportional to 80,762.22, 111,080.96 and 64,811.70 is: 89,142.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,762.22 : 111,080.96 = 64,811.70 : x
  2. Step 2: Convert to fraction form
    80,762.22/111,080.96 = 64,811.70/x
  3. Step 3: Cross multiply
    80,762.22x = 111,080.96 × 64,811.70
  4. Step 4: Simplify right side
    80,762.22x = 7,199,345,855.23
  5. Step 5: Solve for x
    x = 7,199,345,855.23/80,762.22
  6. Step 6: Final answer
    x = 89,142.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.