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Finding the Fourth Proportional to 71,473.86, 98,634.51 and 39,643.29

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Solution

The fourth proportional to 71,473.86, 98,634.51 and 39,643.29 is: 54,708.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,473.86 : 98,634.51 = 39,643.29 : x
  2. Step 2: Convert to fraction form
    71,473.86/98,634.51 = 39,643.29/x
  3. Step 3: Cross multiply
    71,473.86x = 98,634.51 × 39,643.29
  4. Step 4: Simplify right side
    71,473.86x = 3,910,196,483.94
  5. Step 5: Solve for x
    x = 3,910,196,483.94/71,473.86
  6. Step 6: Final answer
    x = 54,708.06

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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.