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Finding the Fourth Proportional to 71,495.88, 107,187.74 and 45,145.26

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Solution

The fourth proportional to 71,495.88, 107,187.74 and 45,145.26 is: 67,682.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,495.88 : 107,187.74 = 45,145.26 : x
  2. Step 2: Convert to fraction form
    71,495.88/107,187.74 = 45,145.26/x
  3. Step 3: Cross multiply
    71,495.88x = 107,187.74 × 45,145.26
  4. Step 4: Simplify right side
    71,495.88x = 4,839,018,391.11
  5. Step 5: Solve for x
    x = 4,839,018,391.11/71,495.88
  6. Step 6: Final answer
    x = 67,682.48

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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.