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Finding the Fourth Proportional to 70,589.40, 105,882.73 and 28,468.54

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Solution

The fourth proportional to 70,589.40, 105,882.73 and 28,468.54 is: 42,702.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,589.40 : 105,882.73 = 28,468.54 : x
  2. Step 2: Convert to fraction form
    70,589.40/105,882.73 = 28,468.54/x
  3. Step 3: Cross multiply
    70,589.40x = 105,882.73 × 28,468.54
  4. Step 4: Simplify right side
    70,589.40x = 3,014,326,734.31
  5. Step 5: Solve for x
    x = 3,014,326,734.31/70,589.40
  6. Step 6: Final answer
    x = 42,702.26

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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.