Home / 78,960.18-118,447.86-31,563.96

Finding the Fourth Proportional to 78,960.18, 118,447.86 and 31,563.96

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Solution

The fourth proportional to 78,960.18, 118,447.86 and 31,563.96 is: 47,348.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,960.18 : 118,447.86 = 31,563.96 : x
  2. Step 2: Convert to fraction form
    78,960.18/118,447.86 = 31,563.96/x
  3. Step 3: Cross multiply
    78,960.18x = 118,447.86 × 31,563.96
  4. Step 4: Simplify right side
    78,960.18x = 3,738,683,515.13
  5. Step 5: Solve for x
    x = 3,738,683,515.13/78,960.18
  6. Step 6: Final answer
    x = 47,348.97

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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.