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Finding the Fourth Proportional to 115,405.92, 159,259.74 and 64,418.21

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Solution

The fourth proportional to 115,405.92, 159,259.74 and 64,418.21 is: 88,896.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,405.92 : 159,259.74 = 64,418.21 : x
  2. Step 2: Convert to fraction form
    115,405.92/159,259.74 = 64,418.21/x
  3. Step 3: Cross multiply
    115,405.92x = 159,259.74 × 64,418.21
  4. Step 4: Simplify right side
    115,405.92x = 10,259,226,511.21
  5. Step 5: Solve for x
    x = 10,259,226,511.21/115,405.92
  6. Step 6: Final answer
    x = 88,896.88

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1.5x scale

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.