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Finding the Fourth Proportional to 72,578.46, 100,152.72 and 40,741.32

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Solution

The fourth proportional to 72,578.46, 100,152.72 and 40,741.32 is: 56,219.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,578.46 : 100,152.72 = 40,741.32 : x
  2. Step 2: Convert to fraction form
    72,578.46/100,152.72 = 40,741.32/x
  3. Step 3: Cross multiply
    72,578.46x = 100,152.72 × 40,741.32
  4. Step 4: Simplify right side
    72,578.46x = 4,080,354,014.39
  5. Step 5: Solve for x
    x = 4,080,354,014.39/72,578.46
  6. Step 6: Final answer
    x = 56,219.90

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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.