Home / 99,338.70-137,138.20-76,626.71

Finding the Fourth Proportional to 99,338.70, 137,138.20 and 76,626.71

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Solution

The fourth proportional to 99,338.70, 137,138.20 and 76,626.71 is: 105,784.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,338.70 : 137,138.20 = 76,626.71 : x
  2. Step 2: Convert to fraction form
    99,338.70/137,138.20 = 76,626.71/x
  3. Step 3: Cross multiply
    99,338.70x = 137,138.20 × 76,626.71
  4. Step 4: Simplify right side
    99,338.70x = 10,508,448,012.50
  5. Step 5: Solve for x
    x = 10,508,448,012.50/99,338.70
  6. Step 6: Final answer
    x = 105,784.03

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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.