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Finding the Fourth Proportional to 71,379.81, 98,507.64 and 39,548.82

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Solution

The fourth proportional to 71,379.81, 98,507.64 and 39,548.82 is: 54,579.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,379.81 : 98,507.64 = 39,548.82 : x
  2. Step 2: Convert to fraction form
    71,379.81/98,507.64 = 39,548.82/x
  3. Step 3: Cross multiply
    71,379.81x = 98,507.64 × 39,548.82
  4. Step 4: Simplify right side
    71,379.81x = 3,895,860,922.98
  5. Step 5: Solve for x
    x = 3,895,860,922.98/71,379.81
  6. Step 6: Final answer
    x = 54,579.31

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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.