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Finding the Fourth Proportional to 172,408.80, 258,613.20 and 119,920.80

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Solution

The fourth proportional to 172,408.80, 258,613.20 and 119,920.80 is: 179,881.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,408.80 : 258,613.20 = 119,920.80 : x
  2. Step 2: Convert to fraction form
    172,408.80/258,613.20 = 119,920.80/x
  3. Step 3: Cross multiply
    172,408.80x = 258,613.20 × 119,920.80
  4. Step 4: Simplify right side
    172,408.80x = 31,013,101,834.56
  5. Step 5: Solve for x
    x = 31,013,101,834.56/172,408.80
  6. Step 6: Final answer
    x = 179,881.20

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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.