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Finding the Fourth Proportional to 116,390.90, 160,640.37 and 68,641.46

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Solution

The fourth proportional to 116,390.90, 160,640.37 and 68,641.46 is: 94,737.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    116,390.90 : 160,640.37 = 68,641.46 : x
  2. Step 2: Convert to fraction form
    116,390.90/160,640.37 = 68,641.46/x
  3. Step 3: Cross multiply
    116,390.90x = 160,640.37 × 68,641.46
  4. Step 4: Simplify right side
    116,390.90x = 11,026,589,531.74
  5. Step 5: Solve for x
    x = 11,026,589,531.74/116,390.90
  6. Step 6: Final answer
    x = 94,737.56

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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.