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Finding the Fourth Proportional to 115,670.64, 159,561.72 and 79,879.44

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Solution

The fourth proportional to 115,670.64, 159,561.72 and 79,879.44 is: 110,189.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,670.64 : 159,561.72 = 79,879.44 : x
  2. Step 2: Convert to fraction form
    115,670.64/159,561.72 = 79,879.44/x
  3. Step 3: Cross multiply
    115,670.64x = 159,561.72 × 79,879.44
  4. Step 4: Simplify right side
    115,670.64x = 12,745,700,839.04
  5. Step 5: Solve for x
    x = 12,745,700,839.04/115,670.64
  6. Step 6: Final answer
    x = 110,189.59

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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.