Home / 78,861.12-118,226.34-31,446.96

Finding the Fourth Proportional to 78,861.12, 118,226.34 and 31,446.96

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Solution

The fourth proportional to 78,861.12, 118,226.34 and 31,446.96 is: 47,144.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,861.12 : 118,226.34 = 31,446.96 : x
  2. Step 2: Convert to fraction form
    78,861.12/118,226.34 = 31,446.96/x
  3. Step 3: Cross multiply
    78,861.12x = 118,226.34 × 31,446.96
  4. Step 4: Simplify right side
    78,861.12x = 3,717,858,984.93
  5. Step 5: Solve for x
    x = 3,717,858,984.93/78,861.12
  6. Step 6: Final answer
    x = 47,144.38

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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.