Home / 159,018.05-219,433.70-87,402.71

Finding the Fourth Proportional to 159,018.05, 219,433.70 and 87,402.71

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Solution

The fourth proportional to 159,018.05, 219,433.70 and 87,402.71 is: 120,609.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,018.05 : 219,433.70 = 87,402.71 : x
  2. Step 2: Convert to fraction form
    159,018.05/219,433.70 = 87,402.71/x
  3. Step 3: Cross multiply
    159,018.05x = 219,433.70 × 87,402.71
  4. Step 4: Simplify right side
    159,018.05x = 19,179,098,511.15
  5. Step 5: Solve for x
    x = 19,179,098,511.15/159,018.05
  6. Step 6: Final answer
    x = 120,609.57

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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.