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Finding the Fourth Proportional to 74,428.70, 111,643.05 and 44,904.20

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Solution

The fourth proportional to 74,428.70, 111,643.05 and 44,904.20 is: 67,356.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,428.70 : 111,643.05 = 44,904.20 : x
  2. Step 2: Convert to fraction form
    74,428.70/111,643.05 = 44,904.20/x
  3. Step 3: Cross multiply
    74,428.70x = 111,643.05 × 44,904.20
  4. Step 4: Simplify right side
    74,428.70x = 5,013,241,845.81
  5. Step 5: Solve for x
    x = 5,013,241,845.81/74,428.70
  6. Step 6: Final answer
    x = 67,356.30

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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.