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Finding the Fourth Proportional to 159,606.61, 220,258.58 and 87,989.18

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Solution

The fourth proportional to 159,606.61, 220,258.58 and 87,989.18 is: 121,425.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,606.61 : 220,258.58 = 87,989.18 : x
  2. Step 2: Convert to fraction form
    159,606.61/220,258.58 = 87,989.18/x
  3. Step 3: Cross multiply
    159,606.61x = 220,258.58 × 87,989.18
  4. Step 4: Simplify right side
    159,606.61x = 19,380,370,300.93
  5. Step 5: Solve for x
    x = 19,380,370,300.93/159,606.61
  6. Step 6: Final answer
    x = 121,425.86

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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.