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Finding the Fourth Proportional to 71,492.18, 107,239.07 and 21,572.75

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Solution

The fourth proportional to 71,492.18, 107,239.07 and 21,572.75 is: 32,359.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,492.18 : 107,239.07 = 21,572.75 : x
  2. Step 2: Convert to fraction form
    71,492.18/107,239.07 = 21,572.75/x
  3. Step 3: Cross multiply
    71,492.18x = 107,239.07 × 21,572.75
  4. Step 4: Simplify right side
    71,492.18x = 2,313,441,969.37
  5. Step 5: Solve for x
    x = 2,313,441,969.37/71,492.18
  6. Step 6: Final answer
    x = 32,359.37

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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.