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Finding the Fourth Proportional to 72,041.40, 107,997.30 and 45,732.60

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Solution

The fourth proportional to 72,041.40, 107,997.30 and 45,732.60 is: 68,557.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,041.40 : 107,997.30 = 45,732.60 : x
  2. Step 2: Convert to fraction form
    72,041.40/107,997.30 = 45,732.60/x
  3. Step 3: Cross multiply
    72,041.40x = 107,997.30 × 45,732.60
  4. Step 4: Simplify right side
    72,041.40x = 4,938,997,321.98
  5. Step 5: Solve for x
    x = 4,938,997,321.98/72,041.40
  6. Step 6: Final answer
    x = 68,557.76

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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.