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Finding the Fourth Proportional to 561,441.57, 841,912.21 and 161,987.38

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Solution

The fourth proportional to 561,441.57, 841,912.21 and 161,987.38 is: 242,908.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,441.57 : 841,912.21 = 161,987.38 : x
  2. Step 2: Convert to fraction form
    561,441.57/841,912.21 = 161,987.38/x
  3. Step 3: Cross multiply
    561,441.57x = 841,912.21 × 161,987.38
  4. Step 4: Simplify right side
    561,441.57x = 136,379,153,087.91
  5. Step 5: Solve for x
    x = 136,379,153,087.91/561,441.57
  6. Step 6: Final answer
    x = 242,908.90

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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.