Home / 318,867.23-478,328.37-82,207.91

Finding the Fourth Proportional to 318,867.23, 478,328.37 and 82,207.91

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Solution

The fourth proportional to 318,867.23, 478,328.37 and 82,207.91 is: 123,318.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,867.23 : 478,328.37 = 82,207.91 : x
  2. Step 2: Convert to fraction form
    318,867.23/478,328.37 = 82,207.91/x
  3. Step 3: Cross multiply
    318,867.23x = 478,328.37 × 82,207.91
  4. Step 4: Simplify right side
    318,867.23x = 39,322,373,199.76
  5. Step 5: Solve for x
    x = 39,322,373,199.76/318,867.23
  6. Step 6: Final answer
    x = 123,318.96

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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.