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Finding the Fourth Proportional to 172,722.75, 258,972.80 and 72,856.23

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Solution

The fourth proportional to 172,722.75, 258,972.80 and 72,856.23 is: 109,237.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,722.75 : 258,972.80 = 72,856.23 : x
  2. Step 2: Convert to fraction form
    172,722.75/258,972.80 = 72,856.23/x
  3. Step 3: Cross multiply
    172,722.75x = 258,972.80 × 72,856.23
  4. Step 4: Simplify right side
    172,722.75x = 18,867,781,516.26
  5. Step 5: Solve for x
    x = 18,867,781,516.26/172,722.75
  6. Step 6: Final answer
    x = 109,237.38

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1.5x scale

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.