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Finding the Fourth Proportional to 78,371.37, 108,185.58 and 52,912.20

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Solution

The fourth proportional to 78,371.37, 108,185.58 and 52,912.20 is: 73,041.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,371.37 : 108,185.58 = 52,912.20 : x
  2. Step 2: Convert to fraction form
    78,371.37/108,185.58 = 52,912.20/x
  3. Step 3: Cross multiply
    78,371.37x = 108,185.58 × 52,912.20
  4. Step 4: Simplify right side
    78,371.37x = 5,724,337,046.08
  5. Step 5: Solve for x
    x = 5,724,337,046.08/78,371.37
  6. Step 6: Final answer
    x = 73,041.18

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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.