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Finding the Fourth Proportional to 118,995.80, 164,212.80 and 65,281.22

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Solution

The fourth proportional to 118,995.80, 164,212.80 and 65,281.22 is: 90,087.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,995.80 : 164,212.80 = 65,281.22 : x
  2. Step 2: Convert to fraction form
    118,995.80/164,212.80 = 65,281.22/x
  3. Step 3: Cross multiply
    118,995.80x = 164,212.80 × 65,281.22
  4. Step 4: Simplify right side
    118,995.80x = 10,720,011,923.62
  5. Step 5: Solve for x
    x = 10,720,011,923.62/118,995.80
  6. Step 6: Final answer
    x = 90,087.31

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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.