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Finding the Fourth Proportional to 72,100.46, 108,080.39 and 28,810.51

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Solution

The fourth proportional to 72,100.46, 108,080.39 and 28,810.51 is: 43,187.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,100.46 : 108,080.39 = 28,810.51 : x
  2. Step 2: Convert to fraction form
    72,100.46/108,080.39 = 28,810.51/x
  3. Step 3: Cross multiply
    72,100.46x = 108,080.39 × 28,810.51
  4. Step 4: Simplify right side
    72,100.46x = 3,113,850,958.72
  5. Step 5: Solve for x
    x = 3,113,850,958.72/72,100.46
  6. Step 6: Final answer
    x = 43,187.67

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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.