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Finding the Fourth Proportional to 171,661.72, 257,434.24 and 87,389.32

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Solution

The fourth proportional to 171,661.72, 257,434.24 and 87,389.32 is: 131,054.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,661.72 : 257,434.24 = 87,389.32 : x
  2. Step 2: Convert to fraction form
    171,661.72/257,434.24 = 87,389.32/x
  3. Step 3: Cross multiply
    171,661.72x = 257,434.24 × 87,389.32
  4. Step 4: Simplify right side
    171,661.72x = 22,497,003,178.32
  5. Step 5: Solve for x
    x = 22,497,003,178.32/171,661.72
  6. Step 6: Final answer
    x = 131,054.28

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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.