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Finding the Fourth Proportional to 159,143.50, 219,623.55 and 87,528.94

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Solution

The fourth proportional to 159,143.50, 219,623.55 and 87,528.94 is: 120,792.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,143.50 : 219,623.55 = 87,528.94 : x
  2. Step 2: Convert to fraction form
    159,143.50/219,623.55 = 87,528.94/x
  3. Step 3: Cross multiply
    159,143.50x = 219,623.55 × 87,528.94
  4. Step 4: Simplify right side
    159,143.50x = 19,223,416,530.54
  5. Step 5: Solve for x
    x = 19,223,416,530.54/159,143.50
  6. Step 6: Final answer
    x = 120,792.97

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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.