Home / 129,450.56-178,697.05-87,033.69

Finding the Fourth Proportional to 129,450.56, 178,697.05 and 87,033.69

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Solution

The fourth proportional to 129,450.56, 178,697.05 and 87,033.69 is: 120,143.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,450.56 : 178,697.05 = 87,033.69 : x
  2. Step 2: Convert to fraction form
    129,450.56/178,697.05 = 87,033.69/x
  3. Step 3: Cross multiply
    129,450.56x = 178,697.05 × 87,033.69
  4. Step 4: Simplify right side
    129,450.56x = 15,552,663,653.61
  5. Step 5: Solve for x
    x = 15,552,663,653.61/129,450.56
  6. Step 6: Final answer
    x = 120,143.66

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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.