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Finding the Fourth Proportional to 85,896.52, 128,738.73 and 62,285.11

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Solution

The fourth proportional to 85,896.52, 128,738.73 and 62,285.11 is: 93,350.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,896.52 : 128,738.73 = 62,285.11 : x
  2. Step 2: Convert to fraction form
    85,896.52/128,738.73 = 62,285.11/x
  3. Step 3: Cross multiply
    85,896.52x = 128,738.73 × 62,285.11
  4. Step 4: Simplify right side
    85,896.52x = 8,018,505,959.31
  5. Step 5: Solve for x
    x = 8,018,505,959.31/85,896.52
  6. Step 6: Final answer
    x = 93,350.77

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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.