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Finding the Fourth Proportional to 153,563.37, 211,912.32 and 89,033.79

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Solution

The fourth proportional to 153,563.37, 211,912.32 and 89,033.79 is: 122,863.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,563.37 : 211,912.32 = 89,033.79 : x
  2. Step 2: Convert to fraction form
    153,563.37/211,912.32 = 89,033.79/x
  3. Step 3: Cross multiply
    153,563.37x = 211,912.32 × 89,033.79
  4. Step 4: Simplify right side
    153,563.37x = 18,867,356,997.29
  5. Step 5: Solve for x
    x = 18,867,356,997.29/153,563.37
  6. Step 6: Final answer
    x = 122,863.66

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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.