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Finding the Fourth Proportional to 85,181.22, 127,884.87 and 72,780.93

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Solution

The fourth proportional to 85,181.22, 127,884.87 and 72,780.93 is: 109,267.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,181.22 : 127,884.87 = 72,780.93 : x
  2. Step 2: Convert to fraction form
    85,181.22/127,884.87 = 72,780.93/x
  3. Step 3: Cross multiply
    85,181.22x = 127,884.87 × 72,780.93
  4. Step 4: Simplify right side
    85,181.22x = 9,307,579,771.53
  5. Step 5: Solve for x
    x = 9,307,579,771.53/85,181.22
  6. Step 6: Final answer
    x = 109,267.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.