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Finding the Fourth Proportional to 159,308.88, 219,844.58 and 87,687.36

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Solution

The fourth proportional to 159,308.88, 219,844.58 and 87,687.36 is: 121,007.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,308.88 : 219,844.58 = 87,687.36 : x
  2. Step 2: Convert to fraction form
    159,308.88/219,844.58 = 87,687.36/x
  3. Step 3: Cross multiply
    159,308.88x = 219,844.58 × 87,687.36
  4. Step 4: Simplify right side
    159,308.88x = 19,277,590,830.51
  5. Step 5: Solve for x
    x = 19,277,590,830.51/159,308.88
  6. Step 6: Final answer
    x = 121,007.64

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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.