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Finding the Fourth Proportional to 69,555.11, 95,879.90 and 42,647.72

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Solution

The fourth proportional to 69,555.11, 95,879.90 and 42,647.72 is: 58,788.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,555.11 : 95,879.90 = 42,647.72 : x
  2. Step 2: Convert to fraction form
    69,555.11/95,879.90 = 42,647.72/x
  3. Step 3: Cross multiply
    69,555.11x = 95,879.90 × 42,647.72
  4. Step 4: Simplify right side
    69,555.11x = 4,089,058,756.05
  5. Step 5: Solve for x
    x = 4,089,058,756.05/69,555.11
  6. Step 6: Final answer
    x = 58,788.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.