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Finding the Fourth Proportional to 71,408.60, 107,127.88 and 21,492.35

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Solution

The fourth proportional to 71,408.60, 107,127.88 and 21,492.35 is: 32,243.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,408.60 : 107,127.88 = 21,492.35 : x
  2. Step 2: Convert to fraction form
    71,408.60/107,127.88 = 21,492.35/x
  3. Step 3: Cross multiply
    71,408.60x = 107,127.88 × 21,492.35
  4. Step 4: Simplify right side
    71,408.60x = 2,302,429,302.35
  5. Step 5: Solve for x
    x = 2,302,429,302.35/71,408.60
  6. Step 6: Final answer
    x = 32,243.03

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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.