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Finding the Fourth Proportional to 118,514.70, 177,340.05 and 87,410.70

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Solution

The fourth proportional to 118,514.70, 177,340.05 and 87,410.70 is: 130,797.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,514.70 : 177,340.05 = 87,410.70 : x
  2. Step 2: Convert to fraction form
    118,514.70/177,340.05 = 87,410.70/x
  3. Step 3: Cross multiply
    118,514.70x = 177,340.05 × 87,410.70
  4. Step 4: Simplify right side
    118,514.70x = 15,501,417,908.54
  5. Step 5: Solve for x
    x = 15,501,417,908.54/118,514.70
  6. Step 6: Final answer
    x = 130,797.43

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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.