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Finding the Fourth Proportional to 118,211.20, 176,884.80 and 87,107.20

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Solution

The fourth proportional to 118,211.20, 176,884.80 and 87,107.20 is: 130,342.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,211.20 : 176,884.80 = 87,107.20 : x
  2. Step 2: Convert to fraction form
    118,211.20/176,884.80 = 87,107.20/x
  3. Step 3: Cross multiply
    118,211.20x = 176,884.80 × 87,107.20
  4. Step 4: Simplify right side
    118,211.20x = 15,407,939,650.56
  5. Step 5: Solve for x
    x = 15,407,939,650.56/118,211.20
  6. Step 6: Final answer
    x = 130,342.47

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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.