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Finding the Fourth Proportional to 101,365.72, 139,723.66 and 79,821.29

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Solution

The fourth proportional to 101,365.72, 139,723.66 and 79,821.29 is: 110,026.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,365.72 : 139,723.66 = 79,821.29 : x
  2. Step 2: Convert to fraction form
    101,365.72/139,723.66 = 79,821.29/x
  3. Step 3: Cross multiply
    101,365.72x = 139,723.66 × 79,821.29
  4. Step 4: Simplify right side
    101,365.72x = 11,152,922,784.72
  5. Step 5: Solve for x
    x = 11,152,922,784.72/101,365.72
  6. Step 6: Final answer
    x = 110,026.57

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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.