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Finding the Fourth Proportional to 72,289.80, 108,348.30 and 37,211.40

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Solution

The fourth proportional to 72,289.80, 108,348.30 and 37,211.40 is: 55,772.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,289.80 : 108,348.30 = 37,211.40 : x
  2. Step 2: Convert to fraction form
    72,289.80/108,348.30 = 37,211.40/x
  3. Step 3: Cross multiply
    72,289.80x = 108,348.30 × 37,211.40
  4. Step 4: Simplify right side
    72,289.80x = 4,031,791,930.62
  5. Step 5: Solve for x
    x = 4,031,791,930.62/72,289.80
  6. Step 6: Final answer
    x = 55,772.63

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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.