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Finding the Fourth Proportional to 128,181.72, 176,900.31 and 73,750.53

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Solution

The fourth proportional to 128,181.72, 176,900.31 and 73,750.53 is: 101,781.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,181.72 : 176,900.31 = 73,750.53 : x
  2. Step 2: Convert to fraction form
    128,181.72/176,900.31 = 73,750.53/x
  3. Step 3: Cross multiply
    128,181.72x = 176,900.31 × 73,750.53
  4. Step 4: Simplify right side
    128,181.72x = 13,046,491,619.66
  5. Step 5: Solve for x
    x = 13,046,491,619.66/128,181.72
  6. Step 6: Final answer
    x = 101,781.22

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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.