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Finding the Fourth Proportional to 72,939.42, 109,409.13 and 17,535.42

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Solution

The fourth proportional to 72,939.42, 109,409.13 and 17,535.42 is: 26,303.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,939.42 : 109,409.13 = 17,535.42 : x
  2. Step 2: Convert to fraction form
    72,939.42/109,409.13 = 17,535.42/x
  3. Step 3: Cross multiply
    72,939.42x = 109,409.13 × 17,535.42
  4. Step 4: Simplify right side
    72,939.42x = 1,918,535,046.38
  5. Step 5: Solve for x
    x = 1,918,535,046.38/72,939.42
  6. Step 6: Final answer
    x = 26,303.13

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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.