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Finding the Fourth Proportional to 80,507.45, 120,763.91 and 21,349.10

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Solution

The fourth proportional to 80,507.45, 120,763.91 and 21,349.10 is: 32,024.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,507.45 : 120,763.91 = 21,349.10 : x
  2. Step 2: Convert to fraction form
    80,507.45/120,763.91 = 21,349.10/x
  3. Step 3: Cross multiply
    80,507.45x = 120,763.91 × 21,349.10
  4. Step 4: Simplify right side
    80,507.45x = 2,578,201,146.26
  5. Step 5: Solve for x
    x = 2,578,201,146.26/80,507.45
  6. Step 6: Final answer
    x = 32,024.38

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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.