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Finding the Fourth Proportional to 84,843.70, 127,265.55 and 80,955.70

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Solution

The fourth proportional to 84,843.70, 127,265.55 and 80,955.70 is: 121,433.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,843.70 : 127,265.55 = 80,955.70 : x
  2. Step 2: Convert to fraction form
    84,843.70/127,265.55 = 80,955.70/x
  3. Step 3: Cross multiply
    84,843.70x = 127,265.55 × 80,955.70
  4. Step 4: Simplify right side
    84,843.70x = 10,302,871,686.14
  5. Step 5: Solve for x
    x = 10,302,871,686.14/84,843.70
  6. Step 6: Final answer
    x = 121,433.55

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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.