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Finding the Fourth Proportional to 70,384.29, 105,583.15 and 19,783.19

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Solution

The fourth proportional to 70,384.29, 105,583.15 and 19,783.19 is: 29,676.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,384.29 : 105,583.15 = 19,783.19 : x
  2. Step 2: Convert to fraction form
    70,384.29/105,583.15 = 19,783.19/x
  3. Step 3: Cross multiply
    70,384.29x = 105,583.15 × 19,783.19
  4. Step 4: Simplify right side
    70,384.29x = 2,088,771,298.72
  5. Step 5: Solve for x
    x = 2,088,771,298.72/70,384.29
  6. Step 6: Final answer
    x = 29,676.67

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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.