Home / 78,450.82-117,639.27-28,495.69

Finding the Fourth Proportional to 78,450.82, 117,639.27 and 28,495.69

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Solution

The fourth proportional to 78,450.82, 117,639.27 and 28,495.69 is: 42,730.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,450.82 : 117,639.27 = 28,495.69 : x
  2. Step 2: Convert to fraction form
    78,450.82/117,639.27 = 28,495.69/x
  3. Step 3: Cross multiply
    78,450.82x = 117,639.27 × 28,495.69
  4. Step 4: Simplify right side
    78,450.82x = 3,352,212,169.75
  5. Step 5: Solve for x
    x = 3,352,212,169.75/78,450.82
  6. Step 6: Final answer
    x = 42,730.11

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1.5x scale

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.