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Finding the Fourth Proportional to 159,317.20, 219,856.02 and 87,695.69

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Solution

The fourth proportional to 159,317.20, 219,856.02 and 87,695.69 is: 121,019.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,317.20 : 219,856.02 = 87,695.69 : x
  2. Step 2: Convert to fraction form
    159,317.20/219,856.02 = 87,695.69/x
  3. Step 3: Cross multiply
    159,317.20x = 219,856.02 × 87,695.69
  4. Step 4: Simplify right side
    159,317.20x = 19,280,425,374.55
  5. Step 5: Solve for x
    x = 19,280,425,374.55/159,317.20
  6. Step 6: Final answer
    x = 121,019.11

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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.