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Finding the Fourth Proportional to 115,577.62, 159,485.22 and 79,310.16

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Solution

The fourth proportional to 115,577.62, 159,485.22 and 79,310.16 is: 109,439.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,577.62 : 159,485.22 = 79,310.16 : x
  2. Step 2: Convert to fraction form
    115,577.62/159,485.22 = 79,310.16/x
  3. Step 3: Cross multiply
    115,577.62x = 159,485.22 × 79,310.16
  4. Step 4: Simplify right side
    115,577.62x = 12,648,798,315.84
  5. Step 5: Solve for x
    x = 12,648,798,315.84/115,577.62
  6. Step 6: Final answer
    x = 109,439.86

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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.