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Finding the Fourth Proportional to 71,400.48, 98,538.49 and 39,579.63

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Solution

The fourth proportional to 71,400.48, 98,538.49 and 39,579.63 is: 54,623.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,400.48 : 98,538.49 = 39,579.63 : x
  2. Step 2: Convert to fraction form
    71,400.48/98,538.49 = 39,579.63/x
  3. Step 3: Cross multiply
    71,400.48x = 98,538.49 × 39,579.63
  4. Step 4: Simplify right side
    71,400.48x = 3,900,116,974.96
  5. Step 5: Solve for x
    x = 3,900,116,974.96/71,400.48
  6. Step 6: Final answer
    x = 54,623.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.