Home / 159,890.31-220,645.17-87,290.73

Finding the Fourth Proportional to 159,890.31, 220,645.17 and 87,290.73

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Solution

The fourth proportional to 159,890.31, 220,645.17 and 87,290.73 is: 120,459.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,890.31 : 220,645.17 = 87,290.73 : x
  2. Step 2: Convert to fraction form
    159,890.31/220,645.17 = 87,290.73/x
  3. Step 3: Cross multiply
    159,890.31x = 220,645.17 × 87,290.73
  4. Step 4: Simplify right side
    159,890.31x = 19,260,277,960.27
  5. Step 5: Solve for x
    x = 19,260,277,960.27/159,890.31
  6. Step 6: Final answer
    x = 120,459.32

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1.5x scale

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.