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Finding the Fourth Proportional to 115,665.37, 159,658.43 and 79,486.63

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Solution

The fourth proportional to 115,665.37, 159,658.43 and 79,486.63 is: 109,719.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,665.37 : 159,658.43 = 79,486.63 : x
  2. Step 2: Convert to fraction form
    115,665.37/159,658.43 = 79,486.63/x
  3. Step 3: Cross multiply
    115,665.37x = 159,658.43 × 79,486.63
  4. Step 4: Simplify right side
    115,665.37x = 12,690,709,755.21
  5. Step 5: Solve for x
    x = 12,690,709,755.21/115,665.37
  6. Step 6: Final answer
    x = 109,719.18

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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.