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Finding the Fourth Proportional to 159,435.50, 220,030.97 and 87,815.50

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Solution

The fourth proportional to 159,435.50, 220,030.97 and 87,815.50 is: 121,190.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,435.50 : 220,030.97 = 87,815.50 : x
  2. Step 2: Convert to fraction form
    159,435.50/220,030.97 = 87,815.50/x
  3. Step 3: Cross multiply
    159,435.50x = 220,030.97 × 87,815.50
  4. Step 4: Simplify right side
    159,435.50x = 19,322,129,646.04
  5. Step 5: Solve for x
    x = 19,322,129,646.04/159,435.50
  6. Step 6: Final answer
    x = 121,190.89

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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.