Home / 212,837.76-319,041.05-138,005.37

Finding the Fourth Proportional to 212,837.76, 319,041.05 and 138,005.37

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Solution

The fourth proportional to 212,837.76, 319,041.05 and 138,005.37 is: 206,868.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,837.76 : 319,041.05 = 138,005.37 : x
  2. Step 2: Convert to fraction form
    212,837.76/319,041.05 = 138,005.37/x
  3. Step 3: Cross multiply
    212,837.76x = 319,041.05 × 138,005.37
  4. Step 4: Simplify right side
    212,837.76x = 44,029,377,460.41
  5. Step 5: Solve for x
    x = 44,029,377,460.41/212,837.76
  6. Step 6: Final answer
    x = 206,868.26

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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.