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Finding the Fourth Proportional to 70,234.60, 105,300.70 and 28,660.20

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Solution

The fourth proportional to 70,234.60, 105,300.70 and 28,660.20 is: 42,969.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,234.60 : 105,300.70 = 28,660.20 : x
  2. Step 2: Convert to fraction form
    70,234.60/105,300.70 = 28,660.20/x
  3. Step 3: Cross multiply
    70,234.60x = 105,300.70 × 28,660.20
  4. Step 4: Simplify right side
    70,234.60x = 3,017,939,122.14
  5. Step 5: Solve for x
    x = 3,017,939,122.14/70,234.60
  6. Step 6: Final answer
    x = 42,969.41

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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.