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Finding the Fourth Proportional to 129,698.56, 179,067.30 and 81,366.74

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Solution

The fourth proportional to 129,698.56, 179,067.30 and 81,366.74 is: 112,338.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,698.56 : 179,067.30 = 81,366.74 : x
  2. Step 2: Convert to fraction form
    129,698.56/179,067.30 = 81,366.74/x
  3. Step 3: Cross multiply
    129,698.56x = 179,067.30 × 81,366.74
  4. Step 4: Simplify right side
    129,698.56x = 14,570,122,441.60
  5. Step 5: Solve for x
    x = 14,570,122,441.60/129,698.56
  6. Step 6: Final answer
    x = 112,338.35

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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.