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Finding the Fourth Proportional to 118,195.81, 163,089.81 and 66,505.70

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Solution

The fourth proportional to 118,195.81, 163,089.81 and 66,505.70 is: 91,766.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,195.81 : 163,089.81 = 66,505.70 : x
  2. Step 2: Convert to fraction form
    118,195.81/163,089.81 = 66,505.70/x
  3. Step 3: Cross multiply
    118,195.81x = 163,089.81 × 66,505.70
  4. Step 4: Simplify right side
    118,195.81x = 10,846,402,384.64
  5. Step 5: Solve for x
    x = 10,846,402,384.64/118,195.81
  6. Step 6: Final answer
    x = 91,766.39

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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.