Home / 135,303.40-186,719.34-78,716.80

Finding the Fourth Proportional to 135,303.40, 186,719.34 and 78,716.80

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Solution

The fourth proportional to 135,303.40, 186,719.34 and 78,716.80 is: 108,629.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,303.40 : 186,719.34 = 78,716.80 : x
  2. Step 2: Convert to fraction form
    135,303.40/186,719.34 = 78,716.80/x
  3. Step 3: Cross multiply
    135,303.40x = 186,719.34 × 78,716.80
  4. Step 4: Simplify right side
    135,303.40x = 14,697,948,942.91
  5. Step 5: Solve for x
    x = 14,697,948,942.91/135,303.40
  6. Step 6: Final answer
    x = 108,629.56

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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.