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Finding the Fourth Proportional to 72,378.77, 108,554.93 and 30,247.58

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Solution

The fourth proportional to 72,378.77, 108,554.93 and 30,247.58 is: 45,365.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,378.77 : 108,554.93 = 30,247.58 : x
  2. Step 2: Convert to fraction form
    72,378.77/108,554.93 = 30,247.58/x
  3. Step 3: Cross multiply
    72,378.77x = 108,554.93 × 30,247.58
  4. Step 4: Simplify right side
    72,378.77x = 3,283,523,722.67
  5. Step 5: Solve for x
    x = 3,283,523,722.67/72,378.77
  6. Step 6: Final answer
    x = 45,365.84

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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.