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Finding the Fourth Proportional to 128,467.80, 192,615.30 and 68,506.20

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Solution

The fourth proportional to 128,467.80, 192,615.30 and 68,506.20 is: 102,713.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,467.80 : 192,615.30 = 68,506.20 : x
  2. Step 2: Convert to fraction form
    128,467.80/192,615.30 = 68,506.20/x
  3. Step 3: Cross multiply
    128,467.80x = 192,615.30 × 68,506.20
  4. Step 4: Simplify right side
    128,467.80x = 13,195,342,264.86
  5. Step 5: Solve for x
    x = 13,195,342,264.86/128,467.80
  6. Step 6: Final answer
    x = 102,713.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.