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Finding the Fourth Proportional to 119,372.81, 164,734.56 and 65,661.91

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Solution

The fourth proportional to 119,372.81, 164,734.56 and 65,661.91 is: 90,613.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,372.81 : 164,734.56 = 65,661.91 : x
  2. Step 2: Convert to fraction form
    119,372.81/164,734.56 = 65,661.91/x
  3. Step 3: Cross multiply
    119,372.81x = 164,734.56 × 65,661.91
  4. Step 4: Simplify right side
    119,372.81x = 10,816,786,428.60
  5. Step 5: Solve for x
    x = 10,816,786,428.60/119,372.81
  6. Step 6: Final answer
    x = 90,613.49

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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.