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Finding the Fourth Proportional to 159,433.53, 220,028.25 and 87,813.54

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Solution

The fourth proportional to 159,433.53, 220,028.25 and 87,813.54 is: 121,188.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,433.53 : 220,028.25 = 87,813.54 : x
  2. Step 2: Convert to fraction form
    159,433.53/220,028.25 = 87,813.54/x
  3. Step 3: Cross multiply
    159,433.53x = 220,028.25 × 87,813.54
  4. Step 4: Simplify right side
    159,433.53x = 19,321,459,532.51
  5. Step 5: Solve for x
    x = 19,321,459,532.51/159,433.53
  6. Step 6: Final answer
    x = 121,188.18

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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.