Home / 212,821.84-319,017.30-137,989.36

Finding the Fourth Proportional to 212,821.84, 319,017.30 and 137,989.36

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Solution

The fourth proportional to 212,821.84, 319,017.30 and 137,989.36 is: 206,844.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,821.84 : 319,017.30 = 137,989.36 : x
  2. Step 2: Convert to fraction form
    212,821.84/319,017.30 = 137,989.36/x
  3. Step 3: Cross multiply
    212,821.84x = 319,017.30 × 137,989.36
  4. Step 4: Simplify right side
    212,821.84x = 44,020,993,055.93
  5. Step 5: Solve for x
    x = 44,020,993,055.93/212,821.84
  6. Step 6: Final answer
    x = 206,844.34

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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.