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Finding the Fourth Proportional to 72,169.34, 108,251.58 and 25,421

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Solution

The fourth proportional to 72,169.34, 108,251.58 and 25,421 is: 38,130.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,169.34 : 108,251.58 = 25,421 : x
  2. Step 2: Convert to fraction form
    72,169.34/108,251.58 = 25,421/x
  3. Step 3: Cross multiply
    72,169.34x = 108,251.58 × 25,421
  4. Step 4: Simplify right side
    72,169.34x = 2,751,863,415.18
  5. Step 5: Solve for x
    x = 2,751,863,415.18/72,169.34
  6. Step 6: Final answer
    x = 38,130.64

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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.