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Finding the Fourth Proportional to 118,216.70, 176,893.05 and 87,112.70

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Solution

The fourth proportional to 118,216.70, 176,893.05 and 87,112.70 is: 130,350.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,216.70 : 176,893.05 = 87,112.70 : x
  2. Step 2: Convert to fraction form
    118,216.70/176,893.05 = 87,112.70/x
  3. Step 3: Cross multiply
    118,216.70x = 176,893.05 × 87,112.70
  4. Step 4: Simplify right side
    118,216.70x = 15,409,631,196.74
  5. Step 5: Solve for x
    x = 15,409,631,196.74/118,216.70
  6. Step 6: Final answer
    x = 130,350.71

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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.