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Finding the Fourth Proportional to 122,908.70, 172,422.10 and 122,908.70

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Solution

The fourth proportional to 122,908.70, 172,422.10 and 122,908.70 is: 172,422.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,908.70 : 172,422.10 = 122,908.70 : x
  2. Step 2: Convert to fraction form
    122,908.70/172,422.10 = 122,908.70/x
  3. Step 3: Cross multiply
    122,908.70x = 172,422.10 × 122,908.70
  4. Step 4: Simplify right side
    122,908.70x = 21,192,176,162.27
  5. Step 5: Solve for x
    x = 21,192,176,162.27/122,908.70
  6. Step 6: Final answer
    x = 172,422.10

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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.