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Finding the Fourth Proportional to 70,269.72, 105,414.30 and 28,707

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Solution

The fourth proportional to 70,269.72, 105,414.30 and 28,707 is: 43,064.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,269.72 : 105,414.30 = 28,707 : x
  2. Step 2: Convert to fraction form
    70,269.72/105,414.30 = 28,707/x
  3. Step 3: Cross multiply
    70,269.72x = 105,414.30 × 28,707
  4. Step 4: Simplify right side
    70,269.72x = 3,026,128,310.10
  5. Step 5: Solve for x
    x = 3,026,128,310.10/70,269.72
  6. Step 6: Final answer
    x = 43,064.47

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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.