Home / 78,416.24-117,624.38-28,487.04

Finding the Fourth Proportional to 78,416.24, 117,624.38 and 28,487.04

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Solution

The fourth proportional to 78,416.24, 117,624.38 and 28,487.04 is: 42,730.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,416.24 : 117,624.38 = 28,487.04 : x
  2. Step 2: Convert to fraction form
    78,416.24/117,624.38 = 28,487.04/x
  3. Step 3: Cross multiply
    78,416.24x = 117,624.38 × 28,487.04
  4. Step 4: Simplify right side
    78,416.24x = 3,350,770,418.04
  5. Step 5: Solve for x
    x = 3,350,770,418.04/78,416.24
  6. Step 6: Final answer
    x = 42,730.57

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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.