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Finding the Fourth Proportional to 70,623.87, 105,909.83 and 28,492.68

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Solution

The fourth proportional to 70,623.87, 105,909.83 and 28,492.68 is: 42,728.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,623.87 : 105,909.83 = 28,492.68 : x
  2. Step 2: Convert to fraction form
    70,623.87/105,909.83 = 28,492.68/x
  3. Step 3: Cross multiply
    70,623.87x = 105,909.83 × 28,492.68
  4. Step 4: Simplify right side
    70,623.87x = 3,017,654,660.85
  5. Step 5: Solve for x
    x = 3,017,654,660.85/70,623.87
  6. Step 6: Final answer
    x = 42,728.54

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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.