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Finding the Fourth Proportional to 158,698.64, 219,004.13 and 90,717.09

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Solution

The fourth proportional to 158,698.64, 219,004.13 and 90,717.09 is: 125,189.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,698.64 : 219,004.13 = 90,717.09 : x
  2. Step 2: Convert to fraction form
    158,698.64/219,004.13 = 90,717.09/x
  3. Step 3: Cross multiply
    158,698.64x = 219,004.13 × 90,717.09
  4. Step 4: Simplify right side
    158,698.64x = 19,867,416,918.00
  5. Step 5: Solve for x
    x = 19,867,416,918.00/158,698.64
  6. Step 6: Final answer
    x = 125,189.59

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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.