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Finding the Fourth Proportional to 115,663.13, 159,655.31 and 79,484.37

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Solution

The fourth proportional to 115,663.13, 159,655.31 and 79,484.37 is: 109,716.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,663.13 : 159,655.31 = 79,484.37 : x
  2. Step 2: Convert to fraction form
    115,663.13/159,655.31 = 79,484.37/x
  3. Step 3: Cross multiply
    115,663.13x = 159,655.31 × 79,484.37
  4. Step 4: Simplify right side
    115,663.13x = 12,690,101,651.62
  5. Step 5: Solve for x
    x = 12,690,101,651.62/115,663.13
  6. Step 6: Final answer
    x = 109,716.05

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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.