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Finding the Fourth Proportional to 72,790.60, 100,442.84 and 40,958.80

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Solution

The fourth proportional to 72,790.60, 100,442.84 and 40,958.80 is: 56,518.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,790.60 : 100,442.84 = 40,958.80 : x
  2. Step 2: Convert to fraction form
    72,790.60/100,442.84 = 40,958.80/x
  3. Step 3: Cross multiply
    72,790.60x = 100,442.84 × 40,958.80
  4. Step 4: Simplify right side
    72,790.60x = 4,114,018,194.99
  5. Step 5: Solve for x
    x = 4,114,018,194.99/72,790.60
  6. Step 6: Final answer
    x = 56,518.54

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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.