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Finding the Fourth Proportional to 115,291.52, 159,104.70 and 64,990.52

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Solution

The fourth proportional to 115,291.52, 159,104.70 and 64,990.52 is: 89,688.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,291.52 : 159,104.70 = 64,990.52 : x
  2. Step 2: Convert to fraction form
    115,291.52/159,104.70 = 64,990.52/x
  3. Step 3: Cross multiply
    115,291.52x = 159,104.70 × 64,990.52
  4. Step 4: Simplify right side
    115,291.52x = 10,340,297,187.44
  5. Step 5: Solve for x
    x = 10,340,297,187.44/115,291.52
  6. Step 6: Final answer
    x = 89,688.27

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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.