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Finding the Fourth Proportional to 72,397.80, 108,510.30 and 30,277.80

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Solution

The fourth proportional to 72,397.80, 108,510.30 and 30,277.80 is: 45,380.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,397.80 : 108,510.30 = 30,277.80 : x
  2. Step 2: Convert to fraction form
    72,397.80/108,510.30 = 30,277.80/x
  3. Step 3: Cross multiply
    72,397.80x = 108,510.30 × 30,277.80
  4. Step 4: Simplify right side
    72,397.80x = 3,285,453,161.34
  5. Step 5: Solve for x
    x = 3,285,453,161.34/72,397.80
  6. Step 6: Final answer
    x = 45,380.57

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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.