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Finding the Fourth Proportional to 72,701.88, 100,325.96 and 40,873.74

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Solution

The fourth proportional to 72,701.88, 100,325.96 and 40,873.74 is: 56,404.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,701.88 : 100,325.96 = 40,873.74 : x
  2. Step 2: Convert to fraction form
    72,701.88/100,325.96 = 40,873.74/x
  3. Step 3: Cross multiply
    72,701.88x = 100,325.96 × 40,873.74
  4. Step 4: Simplify right side
    72,701.88x = 4,100,697,204.29
  5. Step 5: Solve for x
    x = 4,100,697,204.29/72,701.88
  6. Step 6: Final answer
    x = 56,404.28

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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.