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Finding the Fourth Proportional to 172,000.60, 258,000.90 and 45,640.60

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Solution

The fourth proportional to 172,000.60, 258,000.90 and 45,640.60 is: 68,460.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,000.60 : 258,000.90 = 45,640.60 : x
  2. Step 2: Convert to fraction form
    172,000.60/258,000.90 = 45,640.60/x
  3. Step 3: Cross multiply
    172,000.60x = 258,000.90 × 45,640.60
  4. Step 4: Simplify right side
    172,000.60x = 11,775,315,876.54
  5. Step 5: Solve for x
    x = 11,775,315,876.54/172,000.60
  6. Step 6: Final answer
    x = 68,460.90

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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.