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Finding the Fourth Proportional to 81,053.64, 111,604.50 and 69,090.12

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Solution

The fourth proportional to 81,053.64, 111,604.50 and 69,090.12 is: 95,131.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,053.64 : 111,604.50 = 69,090.12 : x
  2. Step 2: Convert to fraction form
    81,053.64/111,604.50 = 69,090.12/x
  3. Step 3: Cross multiply
    81,053.64x = 111,604.50 × 69,090.12
  4. Step 4: Simplify right side
    81,053.64x = 7,710,768,297.54
  5. Step 5: Solve for x
    x = 7,710,768,297.54/81,053.64
  6. Step 6: Final answer
    x = 95,131.67

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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.