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Finding the Fourth Proportional to 171,931.30, 258,006.30 and 100,853.80

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Solution

The fourth proportional to 171,931.30, 258,006.30 and 100,853.80 is: 151,344.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,931.30 : 258,006.30 = 100,853.80 : x
  2. Step 2: Convert to fraction form
    171,931.30/258,006.30 = 100,853.80/x
  3. Step 3: Cross multiply
    171,931.30x = 258,006.30 × 100,853.80
  4. Step 4: Simplify right side
    171,931.30x = 26,020,915,778.94
  5. Step 5: Solve for x
    x = 26,020,915,778.94/171,931.30
  6. Step 6: Final answer
    x = 151,344.84

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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.