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Finding the Fourth Proportional to 72,695.63, 108,998.78 and 28,270.59

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Solution

The fourth proportional to 72,695.63, 108,998.78 and 28,270.59 is: 42,388.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,695.63 : 108,998.78 = 28,270.59 : x
  2. Step 2: Convert to fraction form
    72,695.63/108,998.78 = 28,270.59/x
  3. Step 3: Cross multiply
    72,695.63x = 108,998.78 × 28,270.59
  4. Step 4: Simplify right side
    72,695.63x = 3,081,459,428.80
  5. Step 5: Solve for x
    x = 3,081,459,428.80/72,695.63
  6. Step 6: Final answer
    x = 42,388.51

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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.