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Finding the Fourth Proportional to 72,539.01, 108,742.86 and 25,780.95

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Solution

The fourth proportional to 72,539.01, 108,742.86 and 25,780.95 is: 38,648.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,539.01 : 108,742.86 = 25,780.95 : x
  2. Step 2: Convert to fraction form
    72,539.01/108,742.86 = 25,780.95/x
  3. Step 3: Cross multiply
    72,539.01x = 108,742.86 × 25,780.95
  4. Step 4: Simplify right side
    72,539.01x = 2,803,494,236.52
  5. Step 5: Solve for x
    x = 2,803,494,236.52/72,539.01
  6. Step 6: Final answer
    x = 38,648.09

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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.