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Finding the Fourth Proportional to 159,389.60, 219,959.06 and 87,769.89

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Solution

The fourth proportional to 159,389.60, 219,959.06 and 87,769.89 is: 121,123.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,389.60 : 219,959.06 = 87,769.89 : x
  2. Step 2: Convert to fraction form
    159,389.60/219,959.06 = 87,769.89/x
  3. Step 3: Cross multiply
    159,389.60x = 219,959.06 × 87,769.89
  4. Step 4: Simplify right side
    159,389.60x = 19,305,782,061.85
  5. Step 5: Solve for x
    x = 19,305,782,061.85/159,389.60
  6. Step 6: Final answer
    x = 121,123.23

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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.