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Finding the Fourth Proportional to 70,311.15, 105,480.15 and 25,941.36

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Solution

The fourth proportional to 70,311.15, 105,480.15 and 25,941.36 is: 38,916.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,311.15 : 105,480.15 = 25,941.36 : x
  2. Step 2: Convert to fraction form
    70,311.15/105,480.15 = 25,941.36/x
  3. Step 3: Cross multiply
    70,311.15x = 105,480.15 × 25,941.36
  4. Step 4: Simplify right side
    70,311.15x = 2,736,298,544.00
  5. Step 5: Solve for x
    x = 2,736,298,544.00/70,311.15
  6. Step 6: Final answer
    x = 38,916.99

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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.