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Finding the Fourth Proportional to 72,390.36, 108,546.06 and 21,782.01

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Solution

The fourth proportional to 72,390.36, 108,546.06 and 21,782.01 is: 32,661.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,390.36 : 108,546.06 = 21,782.01 : x
  2. Step 2: Convert to fraction form
    72,390.36/108,546.06 = 21,782.01/x
  3. Step 3: Cross multiply
    72,390.36x = 108,546.06 × 21,782.01
  4. Step 4: Simplify right side
    72,390.36x = 2,364,351,364.38
  5. Step 5: Solve for x
    x = 2,364,351,364.38/72,390.36
  6. Step 6: Final answer
    x = 32,661.14

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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.