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Finding the Fourth Proportional to 72,060.50, 108,129.64 and 35,124.50

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Solution

The fourth proportional to 72,060.50, 108,129.64 and 35,124.50 is: 52,705.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,060.50 : 108,129.64 = 35,124.50 : x
  2. Step 2: Convert to fraction form
    72,060.50/108,129.64 = 35,124.50/x
  3. Step 3: Cross multiply
    72,060.50x = 108,129.64 × 35,124.50
  4. Step 4: Simplify right side
    72,060.50x = 3,797,999,540.18
  5. Step 5: Solve for x
    x = 3,797,999,540.18/72,060.50
  6. Step 6: Final answer
    x = 52,705.71

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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.