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Finding the Fourth Proportional to 172,820.20, 259,230.30 and 143,295.70

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Solution

The fourth proportional to 172,820.20, 259,230.30 and 143,295.70 is: 214,943.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,820.20 : 259,230.30 = 143,295.70 : x
  2. Step 2: Convert to fraction form
    172,820.20/259,230.30 = 143,295.70/x
  3. Step 3: Cross multiply
    172,820.20x = 259,230.30 × 143,295.70
  4. Step 4: Simplify right side
    172,820.20x = 37,146,587,299.71
  5. Step 5: Solve for x
    x = 37,146,587,299.71/172,820.20
  6. Step 6: Final answer
    x = 214,943.55

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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.