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Finding the Fourth Proportional to 86,082.39, 128,884.08 and 43,871.46

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Solution

The fourth proportional to 86,082.39, 128,884.08 and 43,871.46 is: 65,685.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,082.39 : 128,884.08 = 43,871.46 : x
  2. Step 2: Convert to fraction form
    86,082.39/128,884.08 = 43,871.46/x
  3. Step 3: Cross multiply
    86,082.39x = 128,884.08 × 43,871.46
  4. Step 4: Simplify right side
    86,082.39x = 5,654,332,760.36
  5. Step 5: Solve for x
    x = 5,654,332,760.36/86,082.39
  6. Step 6: Final answer
    x = 65,685.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.