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Finding the Fourth Proportional to 159,435.28, 220,030.66 and 87,815.29

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Solution

The fourth proportional to 159,435.28, 220,030.66 and 87,815.29 is: 121,190.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,435.28 : 220,030.66 = 87,815.29 : x
  2. Step 2: Convert to fraction form
    159,435.28/220,030.66 = 87,815.29/x
  3. Step 3: Cross multiply
    159,435.28x = 220,030.66 × 87,815.29
  4. Step 4: Simplify right side
    159,435.28x = 19,322,056,216.79
  5. Step 5: Solve for x
    x = 19,322,056,216.79/159,435.28
  6. Step 6: Final answer
    x = 121,190.59

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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.