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Finding the Fourth Proportional to 157,704.78, 217,638.72 and 94,041.21

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Solution

The fourth proportional to 157,704.78, 217,638.72 and 94,041.21 is: 129,780.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,704.78 : 217,638.72 = 94,041.21 : x
  2. Step 2: Convert to fraction form
    157,704.78/217,638.72 = 94,041.21/x
  3. Step 3: Cross multiply
    157,704.78x = 217,638.72 × 94,041.21
  4. Step 4: Simplify right side
    157,704.78x = 20,467,008,571.65
  5. Step 5: Solve for x
    x = 20,467,008,571.65/157,704.78
  6. Step 6: Final answer
    x = 129,780.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.