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Finding the Fourth Proportional to 172,938.80, 259,408.20 and 137,946.80

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Solution

The fourth proportional to 172,938.80, 259,408.20 and 137,946.80 is: 206,920.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,938.80 : 259,408.20 = 137,946.80 : x
  2. Step 2: Convert to fraction form
    172,938.80/259,408.20 = 137,946.80/x
  3. Step 3: Cross multiply
    172,938.80x = 259,408.20 × 137,946.80
  4. Step 4: Simplify right side
    172,938.80x = 35,784,531,083.76
  5. Step 5: Solve for x
    x = 35,784,531,083.76/172,938.80
  6. Step 6: Final answer
    x = 206,920.20

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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.