Home / 135,109.77-186,462.99-78,517.50

Finding the Fourth Proportional to 135,109.77, 186,462.99 and 78,517.50

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Solution

The fourth proportional to 135,109.77, 186,462.99 and 78,517.50 is: 108,360.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,109.77 : 186,462.99 = 78,517.50 : x
  2. Step 2: Convert to fraction form
    135,109.77/186,462.99 = 78,517.50/x
  3. Step 3: Cross multiply
    135,109.77x = 186,462.99 × 78,517.50
  4. Step 4: Simplify right side
    135,109.77x = 14,640,607,817.33
  5. Step 5: Solve for x
    x = 14,640,607,817.33/135,109.77
  6. Step 6: Final answer
    x = 108,360.84

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1.5x scale

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.