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Finding the Fourth Proportional to 111,984.88, 154,539.14 and 61,683.88

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Solution

The fourth proportional to 111,984.88, 154,539.14 and 61,683.88 is: 85,123.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,984.88 : 154,539.14 = 61,683.88 : x
  2. Step 2: Convert to fraction form
    111,984.88/154,539.14 = 61,683.88/x
  3. Step 3: Cross multiply
    111,984.88x = 154,539.14 × 61,683.88
  4. Step 4: Simplify right side
    111,984.88x = 9,532,572,685.95
  5. Step 5: Solve for x
    x = 9,532,572,685.95/111,984.88
  6. Step 6: Final answer
    x = 85,123.75

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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.