Home / 212,820.84-319,015.80-137,988.36

Finding the Fourth Proportional to 212,820.84, 319,015.80 and 137,988.36

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Solution

The fourth proportional to 212,820.84, 319,015.80 and 137,988.36 is: 206,842.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,820.84 : 319,015.80 = 137,988.36 : x
  2. Step 2: Convert to fraction form
    212,820.84/319,015.80 = 137,988.36/x
  3. Step 3: Cross multiply
    212,820.84x = 319,015.80 × 137,988.36
  4. Step 4: Simplify right side
    212,820.84x = 44,020,467,056.09
  5. Step 5: Solve for x
    x = 44,020,467,056.09/212,820.84
  6. Step 6: Final answer
    x = 206,842.84

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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.