Home / 159,009.10-219,438.34-87,394.58

Finding the Fourth Proportional to 159,009.10, 219,438.34 and 87,394.58

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Solution

The fourth proportional to 159,009.10, 219,438.34 and 87,394.58 is: 120,607.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,009.10 : 219,438.34 = 87,394.58 : x
  2. Step 2: Convert to fraction form
    159,009.10/219,438.34 = 87,394.58/x
  3. Step 3: Cross multiply
    159,009.10x = 219,438.34 × 87,394.58
  4. Step 4: Simplify right side
    159,009.10x = 19,177,721,560.20
  5. Step 5: Solve for x
    x = 19,177,721,560.20/159,009.10
  6. Step 6: Final answer
    x = 120,607.70

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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.