Home / 100,228.26-138,282.46-68,341.80

Finding the Fourth Proportional to 100,228.26, 138,282.46 and 68,341.80

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Solution

The fourth proportional to 100,228.26, 138,282.46 and 68,341.80 is: 94,289.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,228.26 : 138,282.46 = 68,341.80 : x
  2. Step 2: Convert to fraction form
    100,228.26/138,282.46 = 68,341.80/x
  3. Step 3: Cross multiply
    100,228.26x = 138,282.46 × 68,341.80
  4. Step 4: Simplify right side
    100,228.26x = 9,450,471,883.12
  5. Step 5: Solve for x
    x = 9,450,471,883.12/100,228.26
  6. Step 6: Final answer
    x = 94,289.49

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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.