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Finding the Fourth Proportional to 72,347.80, 108,489.30 and 27,959.80

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Solution

The fourth proportional to 72,347.80, 108,489.30 and 27,959.80 is: 41,927.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,347.80 : 108,489.30 = 27,959.80 : x
  2. Step 2: Convert to fraction form
    72,347.80/108,489.30 = 27,959.80/x
  3. Step 3: Cross multiply
    72,347.80x = 108,489.30 × 27,959.80
  4. Step 4: Simplify right side
    72,347.80x = 3,033,339,130.14
  5. Step 5: Solve for x
    x = 3,033,339,130.14/72,347.80
  6. Step 6: Final answer
    x = 41,927.18

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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.