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Finding the Fourth Proportional to 159,411.60, 219,987.63 and 87,791.76

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Solution

The fourth proportional to 159,411.60, 219,987.63 and 87,791.76 is: 121,152.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,411.60 : 219,987.63 = 87,791.76 : x
  2. Step 2: Convert to fraction form
    159,411.60/219,987.63 = 87,791.76/x
  3. Step 3: Cross multiply
    159,411.60x = 219,987.63 × 87,791.76
  4. Step 4: Simplify right side
    159,411.60x = 19,313,101,215.93
  5. Step 5: Solve for x
    x = 19,313,101,215.93/159,411.60
  6. Step 6: Final answer
    x = 121,152.42

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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.