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Finding the Fourth Proportional to 85,445.82, 128,126.82 and 49,916.06

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Solution

The fourth proportional to 85,445.82, 128,126.82 and 49,916.06 is: 74,849.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,445.82 : 128,126.82 = 49,916.06 : x
  2. Step 2: Convert to fraction form
    85,445.82/128,126.82 = 49,916.06/x
  3. Step 3: Cross multiply
    85,445.82x = 128,126.82 × 49,916.06
  4. Step 4: Simplify right side
    85,445.82x = 6,395,586,034.73
  5. Step 5: Solve for x
    x = 6,395,586,034.73/85,445.82
  6. Step 6: Final answer
    x = 74,849.61

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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.