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Finding the Fourth Proportional to 80,522.39, 120,789.95 and 21,358.08

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Solution

The fourth proportional to 80,522.39, 120,789.95 and 21,358.08 is: 32,038.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,522.39 : 120,789.95 = 21,358.08 : x
  2. Step 2: Convert to fraction form
    80,522.39/120,789.95 = 21,358.08/x
  3. Step 3: Cross multiply
    80,522.39x = 120,789.95 × 21,358.08
  4. Step 4: Simplify right side
    80,522.39x = 2,579,841,308.51
  5. Step 5: Solve for x
    x = 2,579,841,308.51/80,522.39
  6. Step 6: Final answer
    x = 32,038.81

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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.