Home / 79,419.24-109,250.28-66,428.64

Finding the Fourth Proportional to 79,419.24, 109,250.28 and 66,428.64

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Solution

The fourth proportional to 79,419.24, 109,250.28 and 66,428.64 is: 91,380.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,419.24 : 109,250.28 = 66,428.64 : x
  2. Step 2: Convert to fraction form
    79,419.24/109,250.28 = 66,428.64/x
  3. Step 3: Cross multiply
    79,419.24x = 109,250.28 × 66,428.64
  4. Step 4: Simplify right side
    79,419.24x = 7,257,347,520.02
  5. Step 5: Solve for x
    x = 7,257,347,520.02/79,419.24
  6. Step 6: Final answer
    x = 91,380.22

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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.