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Finding the Fourth Proportional to 117,198.04, 161,721.72 and 65,505.60

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Solution

The fourth proportional to 117,198.04, 161,721.72 and 65,505.60 is: 90,391.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,198.04 : 161,721.72 = 65,505.60 : x
  2. Step 2: Convert to fraction form
    117,198.04/161,721.72 = 65,505.60/x
  3. Step 3: Cross multiply
    117,198.04x = 161,721.72 × 65,505.60
  4. Step 4: Simplify right side
    117,198.04x = 10,593,678,301.63
  5. Step 5: Solve for x
    x = 10,593,678,301.63/117,198.04
  6. Step 6: Final answer
    x = 90,391.26

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1.5x scale

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.