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Finding the Fourth Proportional to 73,209.94, 109,816.72 and 20,619.08

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Solution

The fourth proportional to 73,209.94, 109,816.72 and 20,619.08 is: 30,929.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,209.94 : 109,816.72 = 20,619.08 : x
  2. Step 2: Convert to fraction form
    73,209.94/109,816.72 = 20,619.08/x
  3. Step 3: Cross multiply
    73,209.94x = 109,816.72 × 20,619.08
  4. Step 4: Simplify right side
    73,209.94x = 2,264,319,735.02
  5. Step 5: Solve for x
    x = 2,264,319,735.02/73,209.94
  6. Step 6: Final answer
    x = 30,929.13

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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.