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Finding the Fourth Proportional to 245,940.80, 339,394.92 and 138,521.48

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Solution

The fourth proportional to 245,940.80, 339,394.92 and 138,521.48 is: 191,157.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,940.80 : 339,394.92 = 138,521.48 : x
  2. Step 2: Convert to fraction form
    245,940.80/339,394.92 = 138,521.48/x
  3. Step 3: Cross multiply
    245,940.80x = 339,394.92 × 138,521.48
  4. Step 4: Simplify right side
    245,940.80x = 47,013,486,622.88
  5. Step 5: Solve for x
    x = 47,013,486,622.88/245,940.80
  6. Step 6: Final answer
    x = 191,157.74

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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.