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Finding the Fourth Proportional to 70,388.32, 105,601.92 and 62,651.20

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Solution

The fourth proportional to 70,388.32, 105,601.92 and 62,651.20 is: 93,994.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,388.32 : 105,601.92 = 62,651.20 : x
  2. Step 2: Convert to fraction form
    70,388.32/105,601.92 = 62,651.20/x
  3. Step 3: Cross multiply
    70,388.32x = 105,601.92 × 62,651.20
  4. Step 4: Simplify right side
    70,388.32x = 6,616,087,010.30
  5. Step 5: Solve for x
    x = 6,616,087,010.30/70,388.32
  6. Step 6: Final answer
    x = 93,994.10

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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.