Home / 100,318.43-138,416.68-68,057.45

Finding the Fourth Proportional to 100,318.43, 138,416.68 and 68,057.45

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Solution

The fourth proportional to 100,318.43, 138,416.68 and 68,057.45 is: 93,903.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,318.43 : 138,416.68 = 68,057.45 : x
  2. Step 2: Convert to fraction form
    100,318.43/138,416.68 = 68,057.45/x
  3. Step 3: Cross multiply
    100,318.43x = 138,416.68 × 68,057.45
  4. Step 4: Simplify right side
    100,318.43x = 9,420,286,190.32
  5. Step 5: Solve for x
    x = 9,420,286,190.32/100,318.43
  6. Step 6: Final answer
    x = 93,903.84

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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.