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Finding the Fourth Proportional to 71,185.60, 98,236.74 and 39,355.84

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Solution

The fourth proportional to 71,185.60, 98,236.74 and 39,355.84 is: 54,311.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,185.60 : 98,236.74 = 39,355.84 : x
  2. Step 2: Convert to fraction form
    71,185.60/98,236.74 = 39,355.84/x
  3. Step 3: Cross multiply
    71,185.60x = 98,236.74 × 39,355.84
  4. Step 4: Simplify right side
    71,185.60x = 3,866,189,421.56
  5. Step 5: Solve for x
    x = 3,866,189,421.56/71,185.60
  6. Step 6: Final answer
    x = 54,311.40

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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.