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Finding the Fourth Proportional to 72,696.60, 109,044.90 and 55,200.60

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Solution

The fourth proportional to 72,696.60, 109,044.90 and 55,200.60 is: 82,800.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,696.60 : 109,044.90 = 55,200.60 : x
  2. Step 2: Convert to fraction form
    72,696.60/109,044.90 = 55,200.60/x
  3. Step 3: Cross multiply
    72,696.60x = 109,044.90 × 55,200.60
  4. Step 4: Simplify right side
    72,696.60x = 6,019,343,906.94
  5. Step 5: Solve for x
    x = 6,019,343,906.94/72,696.60
  6. Step 6: Final answer
    x = 82,800.90

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1.5x scale

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.