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Finding the Fourth Proportional to 131,721.90, 197,145.45 and 131,721.90

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Solution

The fourth proportional to 131,721.90, 197,145.45 and 131,721.90 is: 197,145.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,721.90 : 197,145.45 = 131,721.90 : x
  2. Step 2: Convert to fraction form
    131,721.90/197,145.45 = 131,721.90/x
  3. Step 3: Cross multiply
    131,721.90x = 197,145.45 × 131,721.90
  4. Step 4: Simplify right side
    131,721.90x = 25,968,373,250.36
  5. Step 5: Solve for x
    x = 25,968,373,250.36/131,721.90
  6. Step 6: Final answer
    x = 197,145.45

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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.