Home / 72,145.40-108,218.10-40,652.60

Finding the Fourth Proportional to 72,145.40, 108,218.10 and 40,652.60

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Solution

The fourth proportional to 72,145.40, 108,218.10 and 40,652.60 is: 60,978.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,145.40 : 108,218.10 = 40,652.60 : x
  2. Step 2: Convert to fraction form
    72,145.40/108,218.10 = 40,652.60/x
  3. Step 3: Cross multiply
    72,145.40x = 108,218.10 × 40,652.60
  4. Step 4: Simplify right side
    72,145.40x = 4,399,347,132.06
  5. Step 5: Solve for x
    x = 4,399,347,132.06/72,145.40
  6. Step 6: Final answer
    x = 60,978.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.