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Finding the Fourth Proportional to 158,999.10, 219,418.02 and 91,015.70

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Solution

The fourth proportional to 158,999.10, 219,418.02 and 91,015.70 is: 125,601.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,999.10 : 219,418.02 = 91,015.70 : x
  2. Step 2: Convert to fraction form
    158,999.10/219,418.02 = 91,015.70/x
  3. Step 3: Cross multiply
    158,999.10x = 219,418.02 × 91,015.70
  4. Step 4: Simplify right side
    158,999.10x = 19,970,483,585.82
  5. Step 5: Solve for x
    x = 19,970,483,585.82/158,999.10
  6. Step 6: Final answer
    x = 125,601.24

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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.