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Finding the Fourth Proportional to 70,287.15, 105,314.09 and 49,466.91

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Solution

The fourth proportional to 70,287.15, 105,314.09 and 49,466.91 is: 74,118.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,287.15 : 105,314.09 = 49,466.91 : x
  2. Step 2: Convert to fraction form
    70,287.15/105,314.09 = 49,466.91/x
  3. Step 3: Cross multiply
    70,287.15x = 105,314.09 × 49,466.91
  4. Step 4: Simplify right side
    70,287.15x = 5,209,562,364.43
  5. Step 5: Solve for x
    x = 5,209,562,364.43/70,287.15
  6. Step 6: Final answer
    x = 74,118.28

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1.5x scale

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.