Home / 245,449.11-338,721.80-138,018.21

Finding the Fourth Proportional to 245,449.11, 338,721.80 and 138,018.21

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Solution

The fourth proportional to 245,449.11, 338,721.80 and 138,018.21 is: 190,466.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,449.11 : 338,721.80 = 138,018.21 : x
  2. Step 2: Convert to fraction form
    245,449.11/338,721.80 = 138,018.21/x
  3. Step 3: Cross multiply
    245,449.11x = 338,721.80 × 138,018.21
  4. Step 4: Simplify right side
    245,449.11x = 46,749,774,140.28
  5. Step 5: Solve for x
    x = 46,749,774,140.28/245,449.11
  6. Step 6: Final answer
    x = 190,466.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.