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Finding the Fourth Proportional to 159,320.88, 219,869.10 and 87,707.56

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Solution

The fourth proportional to 159,320.88, 219,869.10 and 87,707.56 is: 121,039.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,320.88 : 219,869.10 = 87,707.56 : x
  2. Step 2: Convert to fraction form
    159,320.88/219,869.10 = 87,707.56/x
  3. Step 3: Cross multiply
    159,320.88x = 219,869.10 × 87,707.56
  4. Step 4: Simplify right side
    159,320.88x = 19,284,182,280.40
  5. Step 5: Solve for x
    x = 19,284,182,280.40/159,320.88
  6. Step 6: Final answer
    x = 121,039.89

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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.