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Finding the Fourth Proportional to 159,118.86, 219,576.51 and 87,501.90

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Solution

The fourth proportional to 159,118.86, 219,576.51 and 87,501.90 is: 120,748.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,118.86 : 219,576.51 = 87,501.90 : x
  2. Step 2: Convert to fraction form
    159,118.86/219,576.51 = 87,501.90/x
  3. Step 3: Cross multiply
    159,118.86x = 219,576.51 × 87,501.90
  4. Step 4: Simplify right side
    159,118.86x = 19,213,361,820.37
  5. Step 5: Solve for x
    x = 19,213,361,820.37/159,118.86
  6. Step 6: Final answer
    x = 120,748.49

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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.