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Finding the Fourth Proportional to 72,004.60, 108,006.90 and 40,511.80

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Solution

The fourth proportional to 72,004.60, 108,006.90 and 40,511.80 is: 60,767.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,004.60 : 108,006.90 = 40,511.80 : x
  2. Step 2: Convert to fraction form
    72,004.60/108,006.90 = 40,511.80/x
  3. Step 3: Cross multiply
    72,004.60x = 108,006.90 × 40,511.80
  4. Step 4: Simplify right side
    72,004.60x = 4,375,553,931.42
  5. Step 5: Solve for x
    x = 4,375,553,931.42/72,004.60
  6. Step 6: Final answer
    x = 60,767.70

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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.