Home / 257,690.11-386,571.63-80,215.06

Finding the Fourth Proportional to 257,690.11, 386,571.63 and 80,215.06

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Solution

The fourth proportional to 257,690.11, 386,571.63 and 80,215.06 is: 120,333.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,690.11 : 386,571.63 = 80,215.06 : x
  2. Step 2: Convert to fraction form
    257,690.11/386,571.63 = 80,215.06/x
  3. Step 3: Cross multiply
    257,690.11x = 386,571.63 × 80,215.06
  4. Step 4: Simplify right side
    257,690.11x = 31,008,866,494.75
  5. Step 5: Solve for x
    x = 31,008,866,494.75/257,690.11
  6. Step 6: Final answer
    x = 120,333.94

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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.