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Finding the Fourth Proportional to 123,212.70, 172,847.70 and 123,212.70

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Solution

The fourth proportional to 123,212.70, 172,847.70 and 123,212.70 is: 172,847.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,212.70 : 172,847.70 = 123,212.70 : x
  2. Step 2: Convert to fraction form
    123,212.70/172,847.70 = 123,212.70/x
  3. Step 3: Cross multiply
    123,212.70x = 172,847.70 × 123,212.70
  4. Step 4: Simplify right side
    123,212.70x = 21,297,031,805.79
  5. Step 5: Solve for x
    x = 21,297,031,805.79/123,212.70
  6. Step 6: Final answer
    x = 172,847.70

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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.