Home / 135,328.92-186,791.40-78,751.20

Finding the Fourth Proportional to 135,328.92, 186,791.40 and 78,751.20

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Solution

The fourth proportional to 135,328.92, 186,791.40 and 78,751.20 is: 108,698.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,328.92 : 186,791.40 = 78,751.20 : x
  2. Step 2: Convert to fraction form
    135,328.92/186,791.40 = 78,751.20/x
  3. Step 3: Cross multiply
    135,328.92x = 186,791.40 × 78,751.20
  4. Step 4: Simplify right side
    135,328.92x = 14,710,046,899.68
  5. Step 5: Solve for x
    x = 14,710,046,899.68/135,328.92
  6. Step 6: Final answer
    x = 108,698.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.