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Finding the Fourth Proportional to 172,959.70, 259,439.55 and 143,435.20

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Solution

The fourth proportional to 172,959.70, 259,439.55 and 143,435.20 is: 215,152.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,959.70 : 259,439.55 = 143,435.20 : x
  2. Step 2: Convert to fraction form
    172,959.70/259,439.55 = 143,435.20/x
  3. Step 3: Cross multiply
    172,959.70x = 259,439.55 × 143,435.20
  4. Step 4: Simplify right side
    172,959.70x = 37,212,763,742.16
  5. Step 5: Solve for x
    x = 37,212,763,742.16/172,959.70
  6. Step 6: Final answer
    x = 215,152.80

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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.