Home / 78,450.45-117,638.71-28,495.32

Finding the Fourth Proportional to 78,450.45, 117,638.71 and 28,495.32

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Solution

The fourth proportional to 78,450.45, 117,638.71 and 28,495.32 is: 42,729.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,450.45 : 117,638.71 = 28,495.32 : x
  2. Step 2: Convert to fraction form
    78,450.45/117,638.71 = 28,495.32/x
  3. Step 3: Cross multiply
    78,450.45x = 117,638.71 × 28,495.32
  4. Step 4: Simplify right side
    78,450.45x = 3,352,152,685.84
  5. Step 5: Solve for x
    x = 3,352,152,685.84/78,450.45
  6. Step 6: Final answer
    x = 42,729.55

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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.