Home / 159,135.21-219,607.25-87,519.78

Finding the Fourth Proportional to 159,135.21, 219,607.25 and 87,519.78

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Solution

The fourth proportional to 159,135.21, 219,607.25 and 87,519.78 is: 120,777.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,135.21 : 219,607.25 = 87,519.78 : x
  2. Step 2: Convert to fraction form
    159,135.21/219,607.25 = 87,519.78/x
  3. Step 3: Cross multiply
    159,135.21x = 219,607.25 × 87,519.78
  4. Step 4: Simplify right side
    159,135.21x = 19,219,977,768.81
  5. Step 5: Solve for x
    x = 19,219,977,768.81/159,135.21
  6. Step 6: Final answer
    x = 120,777.66

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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.