Home / 78,709.62-118,082.91-31,327.59

Finding the Fourth Proportional to 78,709.62, 118,082.91 and 31,327.59

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Solution

The fourth proportional to 78,709.62, 118,082.91 and 31,327.59 is: 46,998.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,709.62 : 118,082.91 = 31,327.59 : x
  2. Step 2: Convert to fraction form
    78,709.62/118,082.91 = 31,327.59/x
  3. Step 3: Cross multiply
    78,709.62x = 118,082.91 × 31,327.59
  4. Step 4: Simplify right side
    78,709.62x = 3,699,252,990.49
  5. Step 5: Solve for x
    x = 3,699,252,990.49/78,709.62
  6. Step 6: Final answer
    x = 46,998.74

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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.