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Finding the Fourth Proportional to 118,277.20, 177,124.20 and 78,619.60

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Solution

The fourth proportional to 118,277.20, 177,124.20 and 78,619.60 is: 117,735.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,277.20 : 177,124.20 = 78,619.60 : x
  2. Step 2: Convert to fraction form
    118,277.20/177,124.20 = 78,619.60/x
  3. Step 3: Cross multiply
    118,277.20x = 177,124.20 × 78,619.60
  4. Step 4: Simplify right side
    118,277.20x = 13,925,433,754.32
  5. Step 5: Solve for x
    x = 13,925,433,754.32/118,277.20
  6. Step 6: Final answer
    x = 117,735.57

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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.