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Finding the Fourth Proportional to 118,989.56, 164,206.86 and 65,274.68

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Solution

The fourth proportional to 118,989.56, 164,206.86 and 65,274.68 is: 90,079.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,989.56 : 164,206.86 = 65,274.68 : x
  2. Step 2: Convert to fraction form
    118,989.56/164,206.86 = 65,274.68/x
  3. Step 3: Cross multiply
    118,989.56x = 164,206.86 × 65,274.68
  4. Step 4: Simplify right side
    118,989.56x = 10,718,550,240.30
  5. Step 5: Solve for x
    x = 10,718,550,240.30/118,989.56
  6. Step 6: Final answer
    x = 90,079.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.