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Finding the Fourth Proportional to 70,438.32, 105,789.10 and 62,007.84

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Solution

The fourth proportional to 70,438.32, 105,789.10 and 62,007.84 is: 93,127.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,438.32 : 105,789.10 = 62,007.84 : x
  2. Step 2: Convert to fraction form
    70,438.32/105,789.10 = 62,007.84/x
  3. Step 3: Cross multiply
    70,438.32x = 105,789.10 × 62,007.84
  4. Step 4: Simplify right side
    70,438.32x = 6,559,753,586.54
  5. Step 5: Solve for x
    x = 6,559,753,586.54/70,438.32
  6. Step 6: Final answer
    x = 93,127.63

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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.