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Finding the Fourth Proportional to 79,000.80, 109,022.40 and 47,172.48

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Solution

The fourth proportional to 79,000.80, 109,022.40 and 47,172.48 is: 65,098.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,000.80 : 109,022.40 = 47,172.48 : x
  2. Step 2: Convert to fraction form
    79,000.80/109,022.40 = 47,172.48/x
  3. Step 3: Cross multiply
    79,000.80x = 109,022.40 × 47,172.48
  4. Step 4: Simplify right side
    79,000.80x = 5,142,856,983.55
  5. Step 5: Solve for x
    x = 5,142,856,983.55/79,000.80
  6. Step 6: Final answer
    x = 65,098.80

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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.