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Finding the Fourth Proportional to 71,530.97, 98,710.85 and 39,699.05

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Solution

The fourth proportional to 71,530.97, 98,710.85 and 39,699.05 is: 54,783.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,530.97 : 98,710.85 = 39,699.05 : x
  2. Step 2: Convert to fraction form
    71,530.97/98,710.85 = 39,699.05/x
  3. Step 3: Cross multiply
    71,530.97x = 98,710.85 × 39,699.05
  4. Step 4: Simplify right side
    71,530.97x = 3,918,726,575.39
  5. Step 5: Solve for x
    x = 3,918,726,575.39/71,530.97
  6. Step 6: Final answer
    x = 54,783.64

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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.