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Finding the Fourth Proportional to 171,993.51, 257,872.55 and 87,590.35

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Solution

The fourth proportional to 171,993.51, 257,872.55 and 87,590.35 is: 131,325.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,993.51 : 257,872.55 = 87,590.35 : x
  2. Step 2: Convert to fraction form
    171,993.51/257,872.55 = 87,590.35/x
  3. Step 3: Cross multiply
    171,993.51x = 257,872.55 × 87,590.35
  4. Step 4: Simplify right side
    171,993.51x = 22,587,146,909.89
  5. Step 5: Solve for x
    x = 22,587,146,909.89/171,993.51
  6. Step 6: Final answer
    x = 131,325.58

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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.