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Finding the Fourth Proportional to 72,407.70, 108,606.15 and 30,276.90

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Solution

The fourth proportional to 72,407.70, 108,606.15 and 30,276.90 is: 45,413.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,407.70 : 108,606.15 = 30,276.90 : x
  2. Step 2: Convert to fraction form
    72,407.70/108,606.15 = 30,276.90/x
  3. Step 3: Cross multiply
    72,407.70x = 108,606.15 × 30,276.90
  4. Step 4: Simplify right side
    72,407.70x = 3,288,257,542.94
  5. Step 5: Solve for x
    x = 3,288,257,542.94/72,407.70
  6. Step 6: Final answer
    x = 45,413.09

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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.