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Finding the Fourth Proportional to 245,679.66, 339,033.96 and 138,249.63

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Solution

The fourth proportional to 245,679.66, 339,033.96 and 138,249.63 is: 190,782.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,679.66 : 339,033.96 = 138,249.63 : x
  2. Step 2: Convert to fraction form
    245,679.66/339,033.96 = 138,249.63/x
  3. Step 3: Cross multiply
    245,679.66x = 339,033.96 × 138,249.63
  4. Step 4: Simplify right side
    245,679.66x = 46,871,319,527.43
  5. Step 5: Solve for x
    x = 46,871,319,527.43/245,679.66
  6. Step 6: Final answer
    x = 190,782.25

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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.