Home / 129,729.40-178,934.57-84,323.64

Finding the Fourth Proportional to 129,729.40, 178,934.57 and 84,323.64

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Solution

The fourth proportional to 129,729.40, 178,934.57 and 84,323.64 is: 116,306.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,729.40 : 178,934.57 = 84,323.64 : x
  2. Step 2: Convert to fraction form
    129,729.40/178,934.57 = 84,323.64/x
  3. Step 3: Cross multiply
    129,729.40x = 178,934.57 × 84,323.64
  4. Step 4: Simplify right side
    129,729.40x = 15,088,412,947.94
  5. Step 5: Solve for x
    x = 15,088,412,947.94/129,729.40
  6. Step 6: Final answer
    x = 116,306.81

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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.