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Finding the Fourth Proportional to 71,763.51, 107,546.85 and 45,421.23

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Solution

The fourth proportional to 71,763.51, 107,546.85 and 45,421.23 is: 68,069.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,763.51 : 107,546.85 = 45,421.23 : x
  2. Step 2: Convert to fraction form
    71,763.51/107,546.85 = 45,421.23/x
  3. Step 3: Cross multiply
    71,763.51x = 107,546.85 × 45,421.23
  4. Step 4: Simplify right side
    71,763.51x = 4,884,910,209.63
  5. Step 5: Solve for x
    x = 4,884,910,209.63/71,763.51
  6. Step 6: Final answer
    x = 68,069.56

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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.