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Finding the Fourth Proportional to 71,190.60, 98,243.64 and 39,360.84

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Solution

The fourth proportional to 71,190.60, 98,243.64 and 39,360.84 is: 54,318.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,190.60 : 98,243.64 = 39,360.84 : x
  2. Step 2: Convert to fraction form
    71,190.60/98,243.64 = 39,360.84/x
  3. Step 3: Cross multiply
    71,190.60x = 98,243.64 × 39,360.84
  4. Step 4: Simplify right side
    71,190.60x = 3,866,952,195.06
  5. Step 5: Solve for x
    x = 3,866,952,195.06/71,190.60
  6. Step 6: Final answer
    x = 54,318.30

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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.