Home / 212,949.70-319,888.40-128,749.54

Finding the Fourth Proportional to 212,949.70, 319,888.40 and 128,749.54

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Solution

The fourth proportional to 212,949.70, 319,888.40 and 128,749.54 is: 193,404.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,949.70 : 319,888.40 = 128,749.54 : x
  2. Step 2: Convert to fraction form
    212,949.70/319,888.40 = 128,749.54/x
  3. Step 3: Cross multiply
    212,949.70x = 319,888.40 × 128,749.54
  4. Step 4: Simplify right side
    212,949.70x = 41,185,484,351.34
  5. Step 5: Solve for x
    x = 41,185,484,351.34/212,949.70
  6. Step 6: Final answer
    x = 193,404.75

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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.