Home / 129,143.41-178,303.98-80,818.81

Finding the Fourth Proportional to 129,143.41, 178,303.98 and 80,818.81

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Solution

The fourth proportional to 129,143.41, 178,303.98 and 80,818.81 is: 111,583.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,143.41 : 178,303.98 = 80,818.81 : x
  2. Step 2: Convert to fraction form
    129,143.41/178,303.98 = 80,818.81/x
  3. Step 3: Cross multiply
    129,143.41x = 178,303.98 × 80,818.81
  4. Step 4: Simplify right side
    129,143.41x = 14,410,315,481.86
  5. Step 5: Solve for x
    x = 14,410,315,481.86/129,143.41
  6. Step 6: Final answer
    x = 111,583.82

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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.