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Finding the Fourth Proportional to 115,659.90, 161,716.50 and 115,659.90

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Solution

The fourth proportional to 115,659.90, 161,716.50 and 115,659.90 is: 161,716.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,659.90 : 161,716.50 = 115,659.90 : x
  2. Step 2: Convert to fraction form
    115,659.90/161,716.50 = 115,659.90/x
  3. Step 3: Cross multiply
    115,659.90x = 161,716.50 × 115,659.90
  4. Step 4: Simplify right side
    115,659.90x = 18,704,114,218.35
  5. Step 5: Solve for x
    x = 18,704,114,218.35/115,659.90
  6. Step 6: Final answer
    x = 161,716.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.