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Finding the Fourth Proportional to 72,766.60, 100,423.74 and 40,933.60

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Solution

The fourth proportional to 72,766.60, 100,423.74 and 40,933.60 is: 56,491.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,766.60 : 100,423.74 = 40,933.60 : x
  2. Step 2: Convert to fraction form
    72,766.60/100,423.74 = 40,933.60/x
  3. Step 3: Cross multiply
    72,766.60x = 100,423.74 × 40,933.60
  4. Step 4: Simplify right side
    72,766.60x = 4,110,705,203.66
  5. Step 5: Solve for x
    x = 4,110,705,203.66/72,766.60
  6. Step 6: Final answer
    x = 56,491.65

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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.