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Finding the Fourth Proportional to 72,601.80, 108,902.70 and 52,918.80

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Solution

The fourth proportional to 72,601.80, 108,902.70 and 52,918.80 is: 79,378.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,601.80 : 108,902.70 = 52,918.80 : x
  2. Step 2: Convert to fraction form
    72,601.80/108,902.70 = 52,918.80/x
  3. Step 3: Cross multiply
    72,601.80x = 108,902.70 × 52,918.80
  4. Step 4: Simplify right side
    72,601.80x = 5,763,000,200.76
  5. Step 5: Solve for x
    x = 5,763,000,200.76/72,601.80
  6. Step 6: Final answer
    x = 79,378.20

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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.