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Finding the Fourth Proportional to 159,341.76, 219,890.43 and 87,723

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Solution

The fourth proportional to 159,341.76, 219,890.43 and 87,723 is: 121,057.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,341.76 : 219,890.43 = 87,723 : x
  2. Step 2: Convert to fraction form
    159,341.76/219,890.43 = 87,723/x
  3. Step 3: Cross multiply
    159,341.76x = 219,890.43 × 87,723
  4. Step 4: Simplify right side
    159,341.76x = 19,289,448,190.89
  5. Step 5: Solve for x
    x = 19,289,448,190.89/159,341.76
  6. Step 6: Final answer
    x = 121,057.08

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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.