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Finding the Fourth Proportional to 73,421.50, 101,321.76 and 39,887.50

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Solution

The fourth proportional to 73,421.50, 101,321.76 and 39,887.50 is: 55,044.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,421.50 : 101,321.76 = 39,887.50 : x
  2. Step 2: Convert to fraction form
    73,421.50/101,321.76 = 39,887.50/x
  3. Step 3: Cross multiply
    73,421.50x = 101,321.76 × 39,887.50
  4. Step 4: Simplify right side
    73,421.50x = 4,041,471,702
  5. Step 5: Solve for x
    x = 4,041,471,702/73,421.50
  6. Step 6: Final answer
    x = 55,044.80

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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.