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Finding the Fourth Proportional to 72,649.18, 100,245.24 and 40,811.74

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Solution

The fourth proportional to 72,649.18, 100,245.24 and 40,811.74 is: 56,314.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,649.18 : 100,245.24 = 40,811.74 : x
  2. Step 2: Convert to fraction form
    72,649.18/100,245.24 = 40,811.74/x
  3. Step 3: Cross multiply
    72,649.18x = 100,245.24 × 40,811.74
  4. Step 4: Simplify right side
    72,649.18x = 4,091,182,671.12
  5. Step 5: Solve for x
    x = 4,091,182,671.12/72,649.18
  6. Step 6: Final answer
    x = 56,314.23

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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.