Home / 135,519.96-187,012.48-78,161.68

Finding the Fourth Proportional to 135,519.96, 187,012.48 and 78,161.68

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Solution

The fourth proportional to 135,519.96, 187,012.48 and 78,161.68 is: 107,860.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,519.96 : 187,012.48 = 78,161.68 : x
  2. Step 2: Convert to fraction form
    135,519.96/187,012.48 = 78,161.68/x
  3. Step 3: Cross multiply
    135,519.96x = 187,012.48 × 78,161.68
  4. Step 4: Simplify right side
    135,519.96x = 14,617,209,617.77
  5. Step 5: Solve for x
    x = 14,617,209,617.77/135,519.96
  6. Step 6: Final answer
    x = 107,860.20

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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.