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Finding the Fourth Proportional to 72,930.66, 109,352.20 and 28,504.47

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Solution

The fourth proportional to 72,930.66, 109,352.20 and 28,504.47 is: 42,739.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,930.66 : 109,352.20 = 28,504.47 : x
  2. Step 2: Convert to fraction form
    72,930.66/109,352.20 = 28,504.47/x
  3. Step 3: Cross multiply
    72,930.66x = 109,352.20 × 28,504.47
  4. Step 4: Simplify right side
    72,930.66x = 3,117,026,504.33
  5. Step 5: Solve for x
    x = 3,117,026,504.33/72,930.66
  6. Step 6: Final answer
    x = 42,739.59

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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.