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Finding the Fourth Proportional to 72,109.80, 108,164.70 and 47,226.60

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Solution

The fourth proportional to 72,109.80, 108,164.70 and 47,226.60 is: 70,839.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,109.80 : 108,164.70 = 47,226.60 : x
  2. Step 2: Convert to fraction form
    72,109.80/108,164.70 = 47,226.60/x
  3. Step 3: Cross multiply
    72,109.80x = 108,164.70 × 47,226.60
  4. Step 4: Simplify right side
    72,109.80x = 5,108,251,021.02
  5. Step 5: Solve for x
    x = 5,108,251,021.02/72,109.80
  6. Step 6: Final answer
    x = 70,839.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.