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Finding the Fourth Proportional to 118,872.30, 178,120.65 and 43,889.10

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Solution

The fourth proportional to 118,872.30, 178,120.65 and 43,889.10 is: 65,764.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,872.30 : 178,120.65 = 43,889.10 : x
  2. Step 2: Convert to fraction form
    118,872.30/178,120.65 = 43,889.10/x
  3. Step 3: Cross multiply
    118,872.30x = 178,120.65 × 43,889.10
  4. Step 4: Simplify right side
    118,872.30x = 7,817,555,019.92
  5. Step 5: Solve for x
    x = 7,817,555,019.92/118,872.30
  6. Step 6: Final answer
    x = 65,764.31

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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.