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Finding the Fourth Proportional to 70,300.28, 105,489.42 and 28,776.44

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Solution

The fourth proportional to 70,300.28, 105,489.42 and 28,776.44 is: 43,180.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,300.28 : 105,489.42 = 28,776.44 : x
  2. Step 2: Convert to fraction form
    70,300.28/105,489.42 = 28,776.44/x
  3. Step 3: Cross multiply
    70,300.28x = 105,489.42 × 28,776.44
  4. Step 4: Simplify right side
    70,300.28x = 3,035,609,965.26
  5. Step 5: Solve for x
    x = 3,035,609,965.26/70,300.28
  6. Step 6: Final answer
    x = 43,180.62

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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.