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Finding the Fourth Proportional to 172,172.25, 258,217.34 and 72,334.35

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Solution

The fourth proportional to 172,172.25, 258,217.34 and 72,334.35 is: 108,484.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,172.25 : 258,217.34 = 72,334.35 : x
  2. Step 2: Convert to fraction form
    172,172.25/258,217.34 = 72,334.35/x
  3. Step 3: Cross multiply
    172,172.25x = 258,217.34 × 72,334.35
  4. Step 4: Simplify right side
    172,172.25x = 18,677,983,085.96
  5. Step 5: Solve for x
    x = 18,677,983,085.96/172,172.25
  6. Step 6: Final answer
    x = 108,484.28

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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.