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Finding the Fourth Proportional to 118,980.90, 164,193.89 and 65,266.16

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Solution

The fourth proportional to 118,980.90, 164,193.89 and 65,266.16 is: 90,067.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,980.90 : 164,193.89 = 65,266.16 : x
  2. Step 2: Convert to fraction form
    118,980.90/164,193.89 = 65,266.16/x
  3. Step 3: Cross multiply
    118,980.90x = 164,193.89 × 65,266.16
  4. Step 4: Simplify right side
    118,980.90x = 10,716,303,548.46
  5. Step 5: Solve for x
    x = 10,716,303,548.46/118,980.90
  6. Step 6: Final answer
    x = 90,067.43

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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.