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Finding the Fourth Proportional to 245,724.80, 339,111.14 and 138,301.80

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Solution

The fourth proportional to 245,724.80, 339,111.14 and 138,301.80 is: 190,862.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,724.80 : 339,111.14 = 138,301.80 : x
  2. Step 2: Convert to fraction form
    245,724.80/339,111.14 = 138,301.80/x
  3. Step 3: Cross multiply
    245,724.80x = 339,111.14 × 138,301.80
  4. Step 4: Simplify right side
    245,724.80x = 46,899,681,062.05
  5. Step 5: Solve for x
    x = 46,899,681,062.05/245,724.80
  6. Step 6: Final answer
    x = 190,862.63

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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.