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Finding the Fourth Proportional to 71,541.82, 98,729.45 and 39,713.68

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Solution

The fourth proportional to 71,541.82, 98,729.45 and 39,713.68 is: 54,805.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,541.82 : 98,729.45 = 39,713.68 : x
  2. Step 2: Convert to fraction form
    71,541.82/98,729.45 = 39,713.68/x
  3. Step 3: Cross multiply
    71,541.82x = 98,729.45 × 39,713.68
  4. Step 4: Simplify right side
    71,541.82x = 3,920,909,783.88
  5. Step 5: Solve for x
    x = 3,920,909,783.88/71,541.82
  6. Step 6: Final answer
    x = 54,805.84

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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.