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Finding the Fourth Proportional to 79,059.50, 109,128.03 and 56,768.30

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Solution

The fourth proportional to 79,059.50, 109,128.03 and 56,768.30 is: 78,358.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,059.50 : 109,128.03 = 56,768.30 : x
  2. Step 2: Convert to fraction form
    79,059.50/109,128.03 = 56,768.30/x
  3. Step 3: Cross multiply
    79,059.50x = 109,128.03 × 56,768.30
  4. Step 4: Simplify right side
    79,059.50x = 6,195,012,745.45
  5. Step 5: Solve for x
    x = 6,195,012,745.45/79,059.50
  6. Step 6: Final answer
    x = 78,358.87

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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.