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Finding the Fourth Proportional to 111,959.20, 154,496.69 and 61,658.20

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Solution

The fourth proportional to 111,959.20, 154,496.69 and 61,658.20 is: 85,084.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,959.20 : 154,496.69 = 61,658.20 : x
  2. Step 2: Convert to fraction form
    111,959.20/154,496.69 = 61,658.20/x
  3. Step 3: Cross multiply
    111,959.20x = 154,496.69 × 61,658.20
  4. Step 4: Simplify right side
    111,959.20x = 9,525,987,927.41
  5. Step 5: Solve for x
    x = 9,525,987,927.41/111,959.20
  6. Step 6: Final answer
    x = 85,084.46

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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.