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Finding the Fourth Proportional to 118,231.20, 177,055.20 and 78,573.60

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Solution

The fourth proportional to 118,231.20, 177,055.20 and 78,573.60 is: 117,666.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,231.20 : 177,055.20 = 78,573.60 : x
  2. Step 2: Convert to fraction form
    118,231.20/177,055.20 = 78,573.60/x
  3. Step 3: Cross multiply
    118,231.20x = 177,055.20 × 78,573.60
  4. Step 4: Simplify right side
    118,231.20x = 13,911,864,462.72
  5. Step 5: Solve for x
    x = 13,911,864,462.72/118,231.20
  6. Step 6: Final answer
    x = 117,666.61

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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.