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Finding the Fourth Proportional to 72,680.76, 100,295.56 and 40,847.60

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Solution

The fourth proportional to 72,680.76, 100,295.56 and 40,847.60 is: 56,367.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,680.76 : 100,295.56 = 40,847.60 : x
  2. Step 2: Convert to fraction form
    72,680.76/100,295.56 = 40,847.60/x
  3. Step 3: Cross multiply
    72,680.76x = 100,295.56 × 40,847.60
  4. Step 4: Simplify right side
    72,680.76x = 4,096,832,916.66
  5. Step 5: Solve for x
    x = 4,096,832,916.66/72,680.76
  6. Step 6: Final answer
    x = 56,367.50

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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.