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Finding the Fourth Proportional to 172,193.40, 258,248.98 and 72,355.48

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Solution

The fourth proportional to 172,193.40, 258,248.98 and 72,355.48 is: 108,515.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,193.40 : 258,248.98 = 72,355.48 : x
  2. Step 2: Convert to fraction form
    172,193.40/258,248.98 = 72,355.48/x
  3. Step 3: Cross multiply
    172,193.40x = 258,248.98 × 72,355.48
  4. Step 4: Simplify right side
    172,193.40x = 18,685,728,907.41
  5. Step 5: Solve for x
    x = 18,685,728,907.41/172,193.40
  6. Step 6: Final answer
    x = 108,515.94

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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.