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Finding the Fourth Proportional to 72,130.60, 108,195.90 and 54,634.60

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Solution

The fourth proportional to 72,130.60, 108,195.90 and 54,634.60 is: 81,951.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,130.60 : 108,195.90 = 54,634.60 : x
  2. Step 2: Convert to fraction form
    72,130.60/108,195.90 = 54,634.60/x
  3. Step 3: Cross multiply
    72,130.60x = 108,195.90 × 54,634.60
  4. Step 4: Simplify right side
    72,130.60x = 5,911,239,718.14
  5. Step 5: Solve for x
    x = 5,911,239,718.14/72,130.60
  6. Step 6: Final answer
    x = 81,951.90

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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.