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Finding the Fourth Proportional to 245,659.92, 339,027.84 and 138,240.24

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Solution

The fourth proportional to 245,659.92, 339,027.84 and 138,240.24 is: 190,781.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,659.92 : 339,027.84 = 138,240.24 : x
  2. Step 2: Convert to fraction form
    245,659.92/339,027.84 = 138,240.24/x
  3. Step 3: Cross multiply
    245,659.92x = 339,027.84 × 138,240.24
  4. Step 4: Simplify right side
    245,659.92x = 46,867,289,968.28
  5. Step 5: Solve for x
    x = 46,867,289,968.28/245,659.92
  6. Step 6: Final answer
    x = 190,781.18

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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.