Home / 245,647.51-339,000.19-138,221.36

Finding the Fourth Proportional to 245,647.51, 339,000.19 and 138,221.36

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Solution

The fourth proportional to 245,647.51, 339,000.19 and 138,221.36 is: 190,749.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,647.51 : 339,000.19 = 138,221.36 : x
  2. Step 2: Convert to fraction form
    245,647.51/339,000.19 = 138,221.36/x
  3. Step 3: Cross multiply
    245,647.51x = 339,000.19 × 138,221.36
  4. Step 4: Simplify right side
    245,647.51x = 46,857,067,302.06
  5. Step 5: Solve for x
    x = 46,857,067,302.06/245,647.51
  6. Step 6: Final answer
    x = 190,749.21

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1.5x scale

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.