Home / 81,693.21-122,547.39-31,777.11

Finding the Fourth Proportional to 81,693.21, 122,547.39 and 31,777.11

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Solution

The fourth proportional to 81,693.21, 122,547.39 and 31,777.11 is: 47,668.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,693.21 : 122,547.39 = 31,777.11 : x
  2. Step 2: Convert to fraction form
    81,693.21/122,547.39 = 31,777.11/x
  3. Step 3: Cross multiply
    81,693.21x = 122,547.39 × 31,777.11
  4. Step 4: Simplify right side
    81,693.21x = 3,894,201,892.24
  5. Step 5: Solve for x
    x = 3,894,201,892.24/81,693.21
  6. Step 6: Final answer
    x = 47,668.61

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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.