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Finding the Fourth Proportional to 111,969.84, 154,518.38 and 61,668.84

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Solution

The fourth proportional to 111,969.84, 154,518.38 and 61,668.84 is: 85,103.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,969.84 : 154,518.38 = 61,668.84 : x
  2. Step 2: Convert to fraction form
    111,969.84/154,518.38 = 61,668.84/x
  3. Step 3: Cross multiply
    111,969.84x = 154,518.38 × 61,668.84
  4. Step 4: Simplify right side
    111,969.84x = 9,528,970,102.52
  5. Step 5: Solve for x
    x = 9,528,970,102.52/111,969.84
  6. Step 6: Final answer
    x = 85,103.00

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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.