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Finding the Fourth Proportional to 171,698.54, 257,707.28 and 87,521.94

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Solution

The fourth proportional to 171,698.54, 257,707.28 and 87,521.94 is: 131,364.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,698.54 : 257,707.28 = 87,521.94 : x
  2. Step 2: Convert to fraction form
    171,698.54/257,707.28 = 87,521.94/x
  3. Step 3: Cross multiply
    171,698.54x = 257,707.28 × 87,521.94
  4. Step 4: Simplify right side
    171,698.54x = 22,555,040,660.11
  5. Step 5: Solve for x
    x = 22,555,040,660.11/171,698.54
  6. Step 6: Final answer
    x = 131,364.20

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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.