Home / 78,555.80-117,763.86-28,626.50

Finding the Fourth Proportional to 78,555.80, 117,763.86 and 28,626.50

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Solution

The fourth proportional to 78,555.80, 117,763.86 and 28,626.50 is: 42,914.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,555.80 : 117,763.86 = 28,626.50 : x
  2. Step 2: Convert to fraction form
    78,555.80/117,763.86 = 28,626.50/x
  3. Step 3: Cross multiply
    78,555.80x = 117,763.86 × 28,626.50
  4. Step 4: Simplify right side
    78,555.80x = 3,371,167,138.29
  5. Step 5: Solve for x
    x = 3,371,167,138.29/78,555.80
  6. Step 6: Final answer
    x = 42,914.30

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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.