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Finding the Fourth Proportional to 101,958.70, 140,707.80 and 56,636.77

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Solution

The fourth proportional to 101,958.70, 140,707.80 and 56,636.77 is: 78,161.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,958.70 : 140,707.80 = 56,636.77 : x
  2. Step 2: Convert to fraction form
    101,958.70/140,707.80 = 56,636.77/x
  3. Step 3: Cross multiply
    101,958.70x = 140,707.80 × 56,636.77
  4. Step 4: Simplify right side
    101,958.70x = 7,969,235,305.81
  5. Step 5: Solve for x
    x = 7,969,235,305.81/101,958.70
  6. Step 6: Final answer
    x = 78,161.41

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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.