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Finding the Fourth Proportional to 160,639.88, 221,691.87 and 89,018.33

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Solution

The fourth proportional to 160,639.88, 221,691.87 and 89,018.33 is: 122,850.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,639.88 : 221,691.87 = 89,018.33 : x
  2. Step 2: Convert to fraction form
    160,639.88/221,691.87 = 89,018.33/x
  3. Step 3: Cross multiply
    160,639.88x = 221,691.87 × 89,018.33
  4. Step 4: Simplify right side
    160,639.88x = 19,734,638,933.52
  5. Step 5: Solve for x
    x = 19,734,638,933.52/160,639.88
  6. Step 6: Final answer
    x = 122,850.19

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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.