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Finding the Fourth Proportional to 111,898.20, 154,421.49 and 60,912.40

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Solution

The fourth proportional to 111,898.20, 154,421.49 and 60,912.40 is: 84,060.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,898.20 : 154,421.49 = 60,912.40 : x
  2. Step 2: Convert to fraction form
    111,898.20/154,421.49 = 60,912.40/x
  3. Step 3: Cross multiply
    111,898.20x = 154,421.49 × 60,912.40
  4. Step 4: Simplify right side
    111,898.20x = 9,406,183,567.48
  5. Step 5: Solve for x
    x = 9,406,183,567.48/111,898.20
  6. Step 6: Final answer
    x = 84,060.19

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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.