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Finding the Fourth Proportional to 159,211.89, 219,704.46 and 87,590.07

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Solution

The fourth proportional to 159,211.89, 219,704.46 and 87,590.07 is: 120,869.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,211.89 : 219,704.46 = 87,590.07 : x
  2. Step 2: Convert to fraction form
    159,211.89/219,704.46 = 87,590.07/x
  3. Step 3: Cross multiply
    159,211.89x = 219,704.46 × 87,590.07
  4. Step 4: Simplify right side
    159,211.89x = 19,243,929,030.71
  5. Step 5: Solve for x
    x = 19,243,929,030.71/159,211.89
  6. Step 6: Final answer
    x = 120,869.92

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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.