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Finding the Fourth Proportional to 72,003.80, 108,005.70 and 45,727.40

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Solution

The fourth proportional to 72,003.80, 108,005.70 and 45,727.40 is: 68,591.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,003.80 : 108,005.70 = 45,727.40 : x
  2. Step 2: Convert to fraction form
    72,003.80/108,005.70 = 45,727.40/x
  3. Step 3: Cross multiply
    72,003.80x = 108,005.70 × 45,727.40
  4. Step 4: Simplify right side
    72,003.80x = 4,938,819,846.18
  5. Step 5: Solve for x
    x = 4,938,819,846.18/72,003.80
  6. Step 6: Final answer
    x = 68,591.10

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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.