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Finding the Fourth Proportional to 71,520.44, 98,699.10 and 39,692.48

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Solution

The fourth proportional to 71,520.44, 98,699.10 and 39,692.48 is: 54,776.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,520.44 : 98,699.10 = 39,692.48 : x
  2. Step 2: Convert to fraction form
    71,520.44/98,699.10 = 39,692.48/x
  3. Step 3: Cross multiply
    71,520.44x = 98,699.10 × 39,692.48
  4. Step 4: Simplify right side
    71,520.44x = 3,917,612,052.77
  5. Step 5: Solve for x
    x = 3,917,612,052.77/71,520.44
  6. Step 6: Final answer
    x = 54,776.12

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1.5x scale

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.