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Finding the Fourth Proportional to 159,072.79, 219,524.67 and 86,480.59

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Solution

The fourth proportional to 159,072.79, 219,524.67 and 86,480.59 is: 119,345.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,072.79 : 219,524.67 = 86,480.59 : x
  2. Step 2: Convert to fraction form
    159,072.79/219,524.67 = 86,480.59/x
  3. Step 3: Cross multiply
    159,072.79x = 219,524.67 × 86,480.59
  4. Step 4: Simplify right side
    159,072.79x = 18,984,622,981.16
  5. Step 5: Solve for x
    x = 18,984,622,981.16/159,072.79
  6. Step 6: Final answer
    x = 119,345.51

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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.