Home / 72,910.20-109,146.60-43,312.80

Finding the Fourth Proportional to 72,910.20, 109,146.60 and 43,312.80

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Solution

The fourth proportional to 72,910.20, 109,146.60 and 43,312.80 is: 64,839.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,910.20 : 109,146.60 = 43,312.80 : x
  2. Step 2: Convert to fraction form
    72,910.20/109,146.60 = 43,312.80/x
  3. Step 3: Cross multiply
    72,910.20x = 109,146.60 × 43,312.80
  4. Step 4: Simplify right side
    72,910.20x = 4,727,444,856.48
  5. Step 5: Solve for x
    x = 4,727,444,856.48/72,910.20
  6. Step 6: Final answer
    x = 64,839.28

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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.