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Finding the Fourth Proportional to 159,317.69, 219,856.07 and 87,695.87

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Solution

The fourth proportional to 159,317.69, 219,856.07 and 87,695.87 is: 121,019.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,317.69 : 219,856.07 = 87,695.87 : x
  2. Step 2: Convert to fraction form
    159,317.69/219,856.07 = 87,695.87/x
  3. Step 3: Cross multiply
    159,317.69x = 219,856.07 × 87,695.87
  4. Step 4: Simplify right side
    159,317.69x = 19,280,468,453.39
  5. Step 5: Solve for x
    x = 19,280,468,453.39/159,317.69
  6. Step 6: Final answer
    x = 121,019.01

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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.