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Finding the Fourth Proportional to 132,336, 182,623.68 and 72,720

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Solution

The fourth proportional to 132,336, 182,623.68 and 72,720 is: 100,353.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,336 : 182,623.68 = 72,720 : x
  2. Step 2: Convert to fraction form
    132,336/182,623.68 = 72,720/x
  3. Step 3: Cross multiply
    132,336x = 182,623.68 × 72,720
  4. Step 4: Simplify right side
    132,336x = 13,280,394,009.60
  5. Step 5: Solve for x
    x = 13,280,394,009.60/132,336
  6. Step 6: Final answer
    x = 100,353.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.