Home / 78,450.57-117,638.89-28,495.44

Finding the Fourth Proportional to 78,450.57, 117,638.89 and 28,495.44

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Solution

The fourth proportional to 78,450.57, 117,638.89 and 28,495.44 is: 42,729.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,450.57 : 117,638.89 = 28,495.44 : x
  2. Step 2: Convert to fraction form
    78,450.57/117,638.89 = 28,495.44/x
  3. Step 3: Cross multiply
    78,450.57x = 117,638.89 × 28,495.44
  4. Step 4: Simplify right side
    78,450.57x = 3,352,171,931.66
  5. Step 5: Solve for x
    x = 3,352,171,931.66/78,450.57
  6. Step 6: Final answer
    x = 42,729.73

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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.