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Finding the Fourth Proportional to 89,657.76, 123,728.64 and 49,372.32

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Solution

The fourth proportional to 89,657.76, 123,728.64 and 49,372.32 is: 68,134.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,657.76 : 123,728.64 = 49,372.32 : x
  2. Step 2: Convert to fraction form
    89,657.76/123,728.64 = 49,372.32/x
  3. Step 3: Cross multiply
    89,657.76x = 123,728.64 × 49,372.32
  4. Step 4: Simplify right side
    89,657.76x = 6,108,770,007.24
  5. Step 5: Solve for x
    x = 6,108,770,007.24/89,657.76
  6. Step 6: Final answer
    x = 68,134.31

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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.