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Finding the Fourth Proportional to 118,612.80, 177,861.60 and 65,966.40

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Solution

The fourth proportional to 118,612.80, 177,861.60 and 65,966.40 is: 98,917.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,612.80 : 177,861.60 = 65,966.40 : x
  2. Step 2: Convert to fraction form
    118,612.80/177,861.60 = 65,966.40/x
  3. Step 3: Cross multiply
    118,612.80x = 177,861.60 × 65,966.40
  4. Step 4: Simplify right side
    118,612.80x = 11,732,889,450.24
  5. Step 5: Solve for x
    x = 11,732,889,450.24/118,612.80
  6. Step 6: Final answer
    x = 98,917.57

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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.