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Finding the Fourth Proportional to 118,701.20, 177,821.40 and 66,016.40

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Solution

The fourth proportional to 118,701.20, 177,821.40 and 66,016.40 is: 98,896.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,701.20 : 177,821.40 = 66,016.40 : x
  2. Step 2: Convert to fraction form
    118,701.20/177,821.40 = 66,016.40/x
  3. Step 3: Cross multiply
    118,701.20x = 177,821.40 × 66,016.40
  4. Step 4: Simplify right side
    118,701.20x = 11,739,128,670.96
  5. Step 5: Solve for x
    x = 11,739,128,670.96/118,701.20
  6. Step 6: Final answer
    x = 98,896.46

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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.