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Finding the Fourth Proportional to 159,350.56, 219,911.72 and 87,729.84

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Solution

The fourth proportional to 159,350.56, 219,911.72 and 87,729.84 is: 121,071.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,350.56 : 219,911.72 = 87,729.84 : x
  2. Step 2: Convert to fraction form
    159,350.56/219,911.72 = 87,729.84/x
  3. Step 3: Cross multiply
    159,350.56x = 219,911.72 × 87,729.84
  4. Step 4: Simplify right side
    159,350.56x = 19,292,820,009.72
  5. Step 5: Solve for x
    x = 19,292,820,009.72/159,350.56
  6. Step 6: Final answer
    x = 121,071.55

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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.