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Finding the Fourth Proportional to 70,000.10, 105,000.15 and 66,209.30

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Solution

The fourth proportional to 70,000.10, 105,000.15 and 66,209.30 is: 99,313.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,000.10 : 105,000.15 = 66,209.30 : x
  2. Step 2: Convert to fraction form
    70,000.10/105,000.15 = 66,209.30/x
  3. Step 3: Cross multiply
    70,000.10x = 105,000.15 × 66,209.30
  4. Step 4: Simplify right side
    70,000.10x = 6,951,986,431.40
  5. Step 5: Solve for x
    x = 6,951,986,431.40/70,000.10
  6. Step 6: Final answer
    x = 99,313.95

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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.