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Finding the Fourth Proportional to 122,920.40, 171,694.90 and 122,920.40

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Solution

The fourth proportional to 122,920.40, 171,694.90 and 122,920.40 is: 171,694.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,920.40 : 171,694.90 = 122,920.40 : x
  2. Step 2: Convert to fraction form
    122,920.40/171,694.90 = 122,920.40/x
  3. Step 3: Cross multiply
    122,920.40x = 171,694.90 × 122,920.40
  4. Step 4: Simplify right side
    122,920.40x = 21,104,805,785.96
  5. Step 5: Solve for x
    x = 21,104,805,785.96/122,920.40
  6. Step 6: Final answer
    x = 171,694.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.