Home / 81,276.16-111,911.88-71,147.92

Finding the Fourth Proportional to 81,276.16, 111,911.88 and 71,147.92

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Solution

The fourth proportional to 81,276.16, 111,911.88 and 71,147.92 is: 97,965.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,276.16 : 111,911.88 = 71,147.92 : x
  2. Step 2: Convert to fraction form
    81,276.16/111,911.88 = 71,147.92/x
  3. Step 3: Cross multiply
    81,276.16x = 111,911.88 × 71,147.92
  4. Step 4: Simplify right side
    81,276.16x = 7,962,297,485.29
  5. Step 5: Solve for x
    x = 7,962,297,485.29/81,276.16
  6. Step 6: Final answer
    x = 97,965.97

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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.