Home / 257,835.56-386,752.19-80,342.69

Finding the Fourth Proportional to 257,835.56, 386,752.19 and 80,342.69

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Solution

The fourth proportional to 257,835.56, 386,752.19 and 80,342.69 is: 120,513.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,835.56 : 386,752.19 = 80,342.69 : x
  2. Step 2: Convert to fraction form
    257,835.56/386,752.19 = 80,342.69/x
  3. Step 3: Cross multiply
    257,835.56x = 386,752.19 × 80,342.69
  4. Step 4: Simplify right side
    257,835.56x = 31,072,708,972.52
  5. Step 5: Solve for x
    x = 31,072,708,972.52/257,835.56
  6. Step 6: Final answer
    x = 120,513.67

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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.