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Finding the Fourth Proportional to 159,569.88, 220,203.81 and 87,956.57

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Solution

The fourth proportional to 159,569.88, 220,203.81 and 87,956.57 is: 121,378.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,569.88 : 220,203.81 = 87,956.57 : x
  2. Step 2: Convert to fraction form
    159,569.88/220,203.81 = 87,956.57/x
  3. Step 3: Cross multiply
    159,569.88x = 220,203.81 × 87,956.57
  4. Step 4: Simplify right side
    159,569.88x = 19,368,370,727.51
  5. Step 5: Solve for x
    x = 19,368,370,727.51/159,569.88
  6. Step 6: Final answer
    x = 121,378.61

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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.