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Finding the Fourth Proportional to 118,512.80, 177,572.36 and 83,378.64

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Solution

The fourth proportional to 118,512.80, 177,572.36 and 83,378.64 is: 124,929.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,512.80 : 177,572.36 = 83,378.64 : x
  2. Step 2: Convert to fraction form
    118,512.80/177,572.36 = 83,378.64/x
  3. Step 3: Cross multiply
    118,512.80x = 177,572.36 × 83,378.64
  4. Step 4: Simplify right side
    118,512.80x = 14,805,741,878.39
  5. Step 5: Solve for x
    x = 14,805,741,878.39/118,512.80
  6. Step 6: Final answer
    x = 124,929.47

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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.