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Finding the Fourth Proportional to 72,087.99, 108,155.11 and 34,650.77

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Solution

The fourth proportional to 72,087.99, 108,155.11 and 34,650.77 is: 51,987.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,087.99 : 108,155.11 = 34,650.77 : x
  2. Step 2: Convert to fraction form
    72,087.99/108,155.11 = 34,650.77/x
  3. Step 3: Cross multiply
    72,087.99x = 108,155.11 × 34,650.77
  4. Step 4: Simplify right side
    72,087.99x = 3,747,657,840.93
  5. Step 5: Solve for x
    x = 3,747,657,840.93/72,087.99
  6. Step 6: Final answer
    x = 51,987.27

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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.